Develop Bugs

need help with my htc s621

hi;
need help with my htc s621, was using it in Vancouver/ Canada;
couple of mounts ago used a service here to unlock it and was able to use it in Iran while I am staying;but with some problem;
on regional/Locale there is no Iran in the country list, there is problem that I think it is related to it;
when I make a call using the keypad, the call will be ended so it won't make a call, but if i save the number into the phone book and call the number from there; then it works, to mention that I changed the locale to Sweden, because this way at least i can make a call from phone book, and when I get a call can not return the all using the number, because it will add the country code to the number, so I have to enter into phone book and remove the country code then be able to use it.
anyway I can make this work?
some kind of ROM update ?
I have searched many local shops here, but there are other models of htc around but not excalibur to get some help;
appreciate any help;

Welcome to forums
have a deep read here:
http://forum.xda-developers.com/showthread.php?t=537151
Reflashing to a newer ROM could help your problem (which I don´t understand quite well)
Good luck,

bluesky88 said:
hi;
need help with my htc s621, was using it in Vancouver/ Canada;
couple of mounts ago used a service here to unlock it and was able to use it in Iran while I am staying;but with some problem;
on regional/Locale there is no Iran in the country list, there is problem that I think it is related to it;
when I make a call using the keypad, the call will be ended so it won't make a call, but if i save the number into the phone book and call the number from there; then it works, to mention that I changed the locale to Sweden, because this way at least i can make a call from phone book, and when I get a call can not return the all using the number, because it will add the country code to the number, so I have to enter into phone book and remove the country code then be able to use it.
anyway I can make this work?
some kind of ROM update ?
I have searched many local shops here, but there are other models of htc around but not excalibur to get some help;
appreciate any help;
Click to expand...
Click to collapse
Hi,
I am also in Vancouver although my phone is a T-Mobile Dash that I got on eBay. You really have a different problem here. I assume that you are using an Iranian SIM card when in Iran and not your Rogers/Fido SIM.
Another guy I work with has a Rogers s621 and even though I unlocked and flashed his ROM for him (originally to the Kavanna 6.1 and now to the EVO 6.5 ROM) he had trouble on trips to China with his China Mobile SIM which itself needed to be unlocked to use it. He ended up buying a phone over there instead.
I assume you are still using the Rogers 6.0 ROM, which is better than the T-Mobile but far behind either of the two I listed above. I would flash to Ookba's 3VO ROM, it is really great and runs beautifully. But follow the direction to the letter, don't skip any steps. I have no idea if it will solve your particular problem, but even if it won't you'll be a lot happier with the phone using it here in BC.
Here is the link to the ROM.
http://forum.xda-developers.com/showthread.php?t=523718

Thanks for the replies guys;
I will do some reading and will upgrade to see if it will become better or not;
yes I still have the Rogers 6.0 ROM; and use an Iranian SIM card;
I wonder if I upgrade and then some problem occurs is it possible to downgrade to what I have, perhaps a way to backup the ROM I have.
Thanks

As long as you follow the instructions on my previous post al should be ok, but in case it fails you can always go back and install another ROM, but believe me if you install any new ROM (6.1 or 6.5) you´ll be so happy that you won´t want to go back

OK;
I did install the new ROM (EVO 6.5 ROM);
it is very nice, I like it but the name of my country Iran is missing in this version also,
by the way I believe this ROM is application unlocked, I wonder why I can not install any application on it;
I searched online and found couple of free apps fo wm 6.5 but it won't be installed. I have not got any error or something.
some of the apps will go half and some up to the end but I don't find it anywhere.
any idea why?
if anyone has installed an application on htc s621 using same ROM please provide a name and a link to download if possible.
appreciate your help.

bluesky88 said:
OK;
I did install the new ROM (EVO 6.5 ROM);
it is very nice, I like it but the name of my country Iran is missing in this version also,
by the way I believe this ROM is application unlocked, I wonder why I can not install any application on it;
I searched online and found couple of free apps fo wm 6.5 but it won't be installed. I have not got any error or something.
some of the apps will go half and some up to the end but I don't find it anywhere.
any idea why?
if anyone has installed an application on htc s621 using same ROM please provide a name and a link to download if possible.
appreciate your help.
Click to expand...
Click to collapse
I don't know if this will help, or whether you have already tried it. You would probably have to do this while in Iran with the Iranian SIM card in the phone. Try entering your settings menu, All Settings > Phone > More > Networks > Menu > Preferred Networks. Scroll down to see if your Iranian network is shown with all the other international choices.
I have no idea how this list is generated, I assume it is by Rogers/Fido here in Vancouver. But you may have a political problem on your hands rather than technical. Are the sanctions against Iran reaching to some organization of cellular providers and the Iranian carriers are being blocked by them from being on the list? I don't know the answer, you would know a lot more about what is restricted in Iran (from within or without) than I would.
In any case, good luck.

OK; Here is what append with my phone;
I upgraded to 3VOLUTION series to see if the dialing problem will be solved or not, everything was OK after installation no errors or something, but as for the calling, as my phone had problem calling out using keypad, now this time after upgrading to wm6.5 my phone could not dial from phone book either,
so practically useless phone, it could only receive calls.
I searched for a solution online , did not find any answer, looked around phone shops here in my city, until I found a guy that said he can make it work, he had a box so in less than 20 minutes did something and phone start working properly, I can make a call from keypad and phone book no problem,
and in the location status the country of Iran is not listed either I am not sure what he did using the box.
I did asked the guy if I upgrade or downgrade WM can the same thing happen again, he was not sure.
I am thinking of downgrading to 6.1 since there are not much application found for 6.5.
but I don't want to pay the guy again for the same thing.
does anyone know of this things?
what he actually did with the box that can not be done without it?
appreciate any help

[Q] No Network Access on Galaxy Note 2 ATT

Hello my name is Stanley, I recently bought a Galaxy Note 2, I'm from the Dominican Republic so I'm using Claro Dominicana, which uses the same baseband as AT&T, basically instead of the signal bar, I get a circle with a straight line on it, I don't have data, I can't make calls, I can't send sms, when I try to call I get no network access message, I believe it does recognize sim because I don't get any type of error when my cellphone boots up, when I bought this cellphone it wasn't rooted, so I decided to root it and flash a rom, I'm having same issues.
Can you guys help me out please? I already have my APN information but it's not helping, I've tried flashing roms and it's not helping, I really don't know what to do, when I first bought it, I tried my sim out and it did have internet, I decided to do a factory reset through settings menu and after that I haven't been able to get any type of signal, I would deeply appreciate your help guys, I'm getting kind of desperate here.

No signal bars means no modem or a sim card for a dead account. Did you pay for any airtime?

stanleyacosta said:
Hello my name is Stanley, I recently bought a Galaxy Note 2, I'm from the Dominican Republic so I'm using Claro Dominicana, which uses the same baseband as AT&T, basically instead of the signal bar, I get a circle with a straight line on it, I don't have data, I can't make calls, I can't send sms, when I try to call I get no network access message, I believe it does recognize sim because I don't get any type of error when my cellphone boots up, when I bought this cellphone it wasn't rooted, so I decided to root it and flash a rom, I'm having same issues.
Can you guys help me out please? I already have my APN information but it's not helping, I've tried flashing roms and it's not helping, I really don't know what to do, when I first bought it, I tried my sim out and it did have internet, I decided to do a factory reset through settings menu and after that I haven't been able to get any type of signal, I would deeply appreciate your help guys, I'm getting kind of desperate here.
Click to expand...
Click to collapse
Did you try the free network unlock?
Might just not be unlocked

rangercaptain said:
No signal bars means no modem or a sim card for a dead account. Did you pay for any airtime?
Click to expand...
Click to collapse
My service is active, I already tried the sim on another cellphone, I can do everything on the other cellphone, I have data, I can make calls, etc, thanks for answer.
crixley said:
Did you try the free network unlock?
Might just not be unlocked
Click to expand...
Click to collapse
I did try it, I'm pretty sure is unlocked because it was just working before factory reset, I guess I can try to do it again, but I'm pretty sure is unlocked.

I tried several roms and modems and nothing worked, the last thing I did was going back to stock through Odin, but I still get same circle with the line on it, a stop sign, right now I'm on 4.1.1 stock..

stanleyacosta said:
I tried several roms and modems and nothing worked, the last thing I did was going back to stock through Odin, but I still get same circle with the line on it, a stop sign, right now I'm on 4.1.1 stock..
Click to expand...
Click to collapse
i don't know if this might be an issues or not, but check your IMEI. T-Mobile webpage has a method to confirm if it been blocked or not.
http://www.t-mobile.com
As of August 8th of 2013, they've re-designed their webpage.
http://www.t-mobile.com/bring-your-own-phone.html
following that link, scroll down until you see this: "Don’t see your device?" and under that, a search box. click on the link below that search box. it'll bring up a screen within the webpage. input the IMEI from your phone (*#06#) and avoid adding "/ ##" as those aren't part of the IMEI. If it report as stolen, chances are, they probably blocked it. If not, then maybe your provider doesn't support the phone itself. you might have to call customer service from your area.

Ziken said:
i don't know if this might be an issues or not, but check your IMEI. T-Mobile webpage has a method to confirm if it been blocked or not.
http://www.t-mobile.com
As of August 8th of 2013, they've re-designed their webpage.
http://www.t-mobile.com/bring-your-own-phone.html
following that link, scroll down until you see this: "Don’t see your device?" and under that, a search box. click on the link below that search box. it'll bring up a screen within the webpage. input the IMEI from your phone (*#06#) and avoid adding "/ ##" as those aren't part of the IMEI. If it report as stolen, chances are, they probably blocked it. If not, then maybe your provider doesn't support the phone itself. you might have to call customer service from your area.
Click to expand...
Click to collapse
I couldn't find information about my imei using that webpage, it wasn't able to locate it, I used this webpage which said is clean http://swappa.com/esn I don't know if that page is good, but it says it's clean and ready for activation.

Try a friends sim card to rule that out

If the phone worked on your network before you rooted and flashed the new rom, then I imagine you must have flashed an incompatible modem. If you flashed stock back via Odin and that didn't fix it, I'm scratching my head. Try stock again. Then remove and insert the sim or toggle airplane mode. If it worked before, stock should fix it.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Hello guys, in this case it was actually a hardware problem it seems that the internal antenna of the cellphone which receives the network signal was damaged, I'm already getting it replaced, I'll let you guys know the results.

stanleyacosta said:
Hello guys, in this case it was actually a hardware problem it seems that the internal antenna of the cellphone which receives the network signal was damaged, I'm already getting it replaced, I'll let you guys know the results.
Click to expand...
Click to collapse
Do you know what was damaged. Is it the wire connecting the USB flex or is it the antenna built into the back housing?

[Q] LG G3 McaFee issues big time

Hi everyone
This is my first post here and a sad one at present.
i restored my G3 back to stock last night and all seemed to go well but now my phone says McaFee mobile security your device is locked and is asking for a pin to unlock it.
i don't have this pin and i don't have a clue how to get it, i purchased the phone as a used mobile and it was all good until i did the root back to stock because lollipop was causing some serious lag issues.
can anyone please help me with a way around this if possible
big thanks in advance

Contact the person who sold you the phone. He entered the PIN. McAfee thinks the phone is stolen now.
You can try flashing stock firmware (kdz) file with CSE flash. It could help
http://forum.xda-developers.com/showthread.php?t=2785089

DelBoy said:
Contact the person who sold you the phone. He entered the PIN. McAfee thinks the phone is stolen now.
You can try flashing stock firmware (kdz) file with CSE flash. It could help
http://forum.xda-developers.com/showthread.php?t=2785089
Click to expand...
Click to collapse
Thanks for the reply
I contacted the seller and it seems the phone is infact 3rd hand if not more and basically he does not have the pin
i did the firmware flash and thats why I'm in the pickle now as the phone knows its been factory reset and MacaFee kicks in for security, the sellers not interested as he sold me the phone working which it was but lollipop was just killing the phone when i updated it and after trying to get back to kitkat I'm in brick land

If anyone else has a suggestion or can help then please do get in touch if possible
Thank you

In fact the previous owner set up an account here: McAffee Mobile Security.
Contact someone there and explain your situation.

I will contact McAfee for sure and see if they can help me but I do believe the answer I will receive will be can't help and I come to this conclusion through general security measure because I'm pretty sure anyone could steel a phone and call them up asking for the unlock code but let's see what they say.
If anyone has had this happen and have found a way around the issue please do send me a private message if you don't wish to publish it as I am stuck big time at present
Cheers

I have just got off the phone with McAfee customer support here in the UK and well to be blunt I'm up that creek without a paddle
Nothing they can do for me because even though the software licence is valid and I have the original owners email address that confirms this because I don't have a prof of purchase for the phone like a receipt or mobile number for the original owner they can not help me I'm anyway
All they said I can do is to keep emailing the owner with this email address and hope for a reply and if I get one enter the pin and it will unlock
So people be very careful if you don't have the pin for your phone as it looks like I have just lost £240 and now have a brick to look at
Again if any of you wonderfully cleaver people know of a fix please do help me out if possible
Thanks
Joe

talk2joe said:
I have just got off the phone with McAfee customer support here in the UK and well to be blunt I'm up that creek without a paddle
Nothing they can do for me because even though the software licence is valid and I have the original owners email address that confirms this because I don't have a prof of purchase for the phone like a receipt or mobile number for the original owner they can not help me I'm anyway
All they said I can do is to keep emailing the owner with this email address and hope for a reply and if I get one enter the pin and it will unlock
So people be very careful if you don't have the pin for your phone as it looks like I have just lost £240 and now have a brick to look at
Again if any of you wonderfully cleaver people know of a fix please do help me out if possible
Thanks
Joe
Click to expand...
Click to collapse
have you tried any diff roms or cyanogen mod? maybe a diff software wont have the mcafee on like cyanogen mod

No I haven't tried to put any other software on because I can no longer access download mode as the McAfee has a kill switch and won't let me do anything from what I can see.
All I can do it switch on my device I can't even get into setting properly because the McAfee block kicks in to quickly and I've tried probably 20 odd times
If anyone can explain a way for me to flash another operating system onto my handset please get in touch as I will try anything rather than have a dead phone and e out of pocket
Cheers

Take it some private repair shop. They will solve your issue.

DelBoy said:
Take it some private repair shop. They will solve your issue.
Click to expand...
Click to collapse
If i can not get around this fix i will defo take it to a shop as you mentioned and try my luck.
but i have some news
i have managed to get into the phone and it allows me to gain access without lock down but no sim installed yet.
i followed the steps from an earlier thread on how to get to buddy lock code and gain access to Macafee software but i do not see or can not figure out how to enter a buddy number as suggested in the last part of the solution
anyone know how to enter a buddy number please
cheers

Bump up just for those who might have missed this thread
Anyone know how I add buddy number please
Cheers

open the apk. on top , on the right there are like three dots. settings, scroll down to find device-buddy list.
under settings you can also see subscription info. there you can find the email of the person who set up the apk.

Well just wanted to say thanks to everyones help who replied or sent me a ptivate message
My phone is back and working well and i now have a new password for mcafee
Took some time and my device went through a few stalls n freezing trips but after being persistant i got around the issues.
Cheers to all

talk2joe said:
Well just wanted to say thanks to everyones help who replied or sent me a ptivate message
My phone is back and working well and i now have a new password for mcafee
Took some time and my device went through a few stalls n freezing trips but after being persistant i got around the issues.
Cheers to all
Click to expand...
Click to collapse
how were you able to enter the buddy code?

i have the same problem..i cant access my lg g3 because of mcafee.. i dont know the pincode.. im the 3rd owner of the phone and i dont know how to contact the first person who bought this.. im begging you guys please help me

cass10 said:
i have the same problem..i cant access my lg g3 because of mcafee.. i dont know the pincode.. im the 3rd owner of the phone and i dont know how to contact the first person who bought this.. im begging you guys please help me
Click to expand...
Click to collapse
Deleted

here is the method :https://forum.xda-developers.com/lg...are-method-t3534946/post70470494#post70470494

How sim unlock Galaxy J500FN

Hi everyone.
I got phone from UK and i want use in PL.
I would like unlock sim card only.
Maybe I have to install new ROM and all will be good?
Any hint, please?

sever321 said:
Hi everyone.
I got phone from UK and i want use in PL.
I would like unlock sim card only.
Maybe I have to install new ROM and all will be good?
Any hint, please?
Click to expand...
Click to collapse
Sim lock is related to hardware. You can't unlock by flashing software. (Like OS)

MaDaLiNoSt said:
Sim lock is related to hardware. You can't unlock by flashing software. (Like OS)
Click to expand...
Click to collapse
sim lock is also known network lock right? but why theres a lot of cases that they successfully unlock their phone using z3x or other samsung tool box?
---------- Post added at 06:27 PM ---------- Previous post was at 06:00 PM ----------
sever321 said:
Hi everyone.
I got phone from UK and i want use in PL.
I would like unlock sim card only.
Maybe I have to install new ROM and all will be good?
Any hint, please?
Click to expand...
Click to collapse
try to flash firmware for specific country you want to use your phone, find here
http://www.sammobile.com/firmwares/
or you can dial a code *#272* "you imei no." # and choose your country code for poland choose XEO and touch install then reboot and be free :good:
I recommend the dial code cause its safer and easier for me
IT WILL FACTORY RESET YOU PHONE SO MAKE A FULL BACK-UP :good:

maxxetan said:
try to flash firmware for specific country you want to use your phone, find here
http://www.sammobile.com/firmwares/
or you can dial a code *#272* "you imei no." # and choose your country code for poland choose XEO and touch install then reboot and be free :good:
I recommend the dial code cause its safer and easier for me
IT WILL FACTORY RESET YOU PHONE SO MAKE A FULL BACK-UP :good:
Click to expand...
Click to collapse
What the code for middle east?

i had a similar problem and contacted samsung in the live chat they assured me all you need to do is a 5min pone call with a si in the original region and then it will be unlocked. in my case the phone was from poland and i need to use it with a brazilian sim. Im testing this rigth this moment.
drum roll
and the results are in:
it worked !!! after a 5:36 call (jsut to be sure) the phone no longer says anything about the sim being locked as it did before.
here is the chat:
Amber
11:55:03
Welcome to Samsung Support. Please allow me a moment to read through your enquiry.
Vinicius Costa
11:55:41
good afternnon i would like to obtain the unlock code for my wifes phone
11:56:46
she just got it as a gift and i tested sim cad for the country where we live (Brazil) but hte phone is locked and it was a gift from her mom i would like to help them as my in law is very nervous about this issue
11:57:09
i told her that i would talk to the samsung support and they would probabilly solve this issue for us
11:57:21
would unlocking the sim void the warranty?
11:57:45
i wouldn´t think so because this is only a software lock
11:57:50
can you guys help me?
We don't unlock phones here
11:58:31
In what way is the phone locked? To network? Or region?
ME
11:58:43
region
11:59:03
she bought it on a shop its not tagged to any network
11:59:21
i can provide scan of the receit or ayhting that may be nescessary
Amber
11:59:26
Okay, it needs to have a five minute call in it's country of origin, otherwise it will not work.
11:59:36
There is no other way to unlock the phone
Me
11:59:36
the phone isnt branded with any network
Amber
11:59:56
Yes, but you would need to make a call in the UK or EU for 5 minutes.
ME
12:00:07
so if she makes a 5 minute phone call in the country of origin the phone will unlock by itself?
Amber
12:00:14
Yes
12:00:26
Needs to be to another number in that country/
ME
12:00:38
im still in urope so all i have to do is make a 5 minute phone call to a european number and pronto?!
12:00:45
voila that is problem solved?
Amber
12:00:46
Yes! That's great
ME
12:01:02
Oh man that is great
12:01:21
samsung already kickign lg´s ass in less than an hour we have the phone
12:01:26
Amber
12:01:41
Haha, it's super lucky you're still in the EU!
12:01:45
Is there anything else I can help you with today?
ME
12:01:57
and then after that 5 minutes phone call we can insert a brazilian sim to test?
12:02:09
yes indeed its lucky
12:02:45
you can help me by confirming that after the 5 miutes call with an eurpoean sim i can swithc for the BR sim and it will be ok
Amber
12:02:55
Yes
ME
12:03:13
great thank you very much
12:03:26
that is all the help i need today
Amber
12:03:39
Thanks for contacting Samsung today, I hope you have a wonderful day! If you could fill out the short survey after chat that would really help me a lot Thanks again!
me
12:03:45
you too amber
12:03:56
i will give you good grades!
12:03:59
Amber
12:04:03
Thanks!!
PS I EDITED MY REAL NAME IN THERE

Cabronbr said:
i had a similar problem and contacted samsung in the live chat they assured me all you need to do is a 5min pone call with a si in the original region and then it will be unlocked. in my case the phone was from poland and i need to use it with a brazilian sim. Im testing this rigth this moment.
drum roll
and the results are in:
it worked !!! after a 5:36 call (jsut to be sure) the phone no longer says anything about the sim being locked as it did before.
here is the chat:
Amber
11:55:03
Welcome to Samsung Support. Please allow me a moment to read through your enquiry.
Vinicius Costa
11:55:41
good afternnon i would like to obtain the unlock code for my wifes phone
11:56:46
she just got it as a gift and i tested sim cad for the country where we live (Brazil) but hte phone is locked and it was a gift from her mom i would like to help them as my in law is very nervous about this issue
11:57:09
i told her that i would talk to the samsung support and they would probabilly solve this issue for us
11:57:21
would unlocking the sim void the warranty?
11:57:45
i wouldn´t think so because this is only a software lock
11:57:50
can you guys help me?
We don't unlock phones here
11:58:31
In what way is the phone locked? To network? Or region?
ME
11:58:43
region
11:59:03
she bought it on a shop its not tagged to any network
11:59:21
i can provide scan of the receit or ayhting that may be nescessary
Amber
11:59:26
Okay, it needs to have a five minute call in it's country of origin, otherwise it will not work.
11:59:36
There is no other way to unlock the phone
Me
11:59:36
the phone isnt branded with any network
Amber
11:59:56
Yes, but you would need to make a call in the UK or EU for 5 minutes.
ME
12:00:07
so if she makes a 5 minute phone call in the country of origin the phone will unlock by itself?
Amber
12:00:14
Yes
12:00:26
Needs to be to another number in that country/
ME
12:00:38
im still in urope so all i have to do is make a 5 minute phone call to a european number and pronto?!
12:00:45
voila that is problem solved?
Amber
12:00:46
Yes! That's great
ME
12:01:02
Oh man that is great
12:01:21
samsung already kickign lg´s ass in less than an hour we have the phone
12:01:26
Amber
12:01:41
Haha, it's super lucky you're still in the EU!
12:01:45
Is there anything else I can help you with today?
ME
12:01:57
and then after that 5 minutes phone call we can insert a brazilian sim to test?
12:02:09
yes indeed its lucky
12:02:45
you can help me by confirming that after the 5 miutes call with an eurpoean sim i can swithc for the BR sim and it will be ok
Amber
12:02:55
Yes
ME
12:03:13
great thank you very much
12:03:26
that is all the help i need today
Amber
12:03:39
Thanks for contacting Samsung today, I hope you have a wonderful day! If you could fill out the short survey after chat that would really help me a lot Thanks again!
me
12:03:45
you too amber
12:03:56
i will give you good grades!
12:03:59
Amber
12:04:03
Thanks!!
PS I EDITED MY REAL NAME IN THERE
Click to expand...
Click to collapse
Whenever my friends use to purchase mobile which was in an offer by network locked in the middle east, they used to call for 5-10 mins in the same country before sending it to their families in another. And I used to think they were STUPID. Fortunately, their network locked mobiles do get unlocked but I couldn't believe them as I didn't understand the logic behind it. After hearing your success story, I kinda believe it but still how will it unlock technically?
---------- Post added at 12:39 PM ---------- Previous post was at 12:38 PM ----------
mirasal2 said:
What the code for middle east?
Click to expand...
Click to collapse
Did you succeed in unlocking your mobile in the middle east?
I'm still stuck

cooldudell said:
Did you succeed in unlocking your mobile in the middle east?
I'm still stuck
Click to expand...
Click to collapse
Not at all ,I just "نسيت الموضوع"

J510f country unlock
dear need J510f Country unlock solution, i have z3x and octopus box please help me if anyone get solution.........

maxxetan said:
sim lock is also known network lock right? but why theres a lot of cases that they successfully unlock their phone using z3x or other samsung tool box?
---------- Post added at 06:27 PM ---------- Previous post was at 06:00 PM ----------
try to flash firmware for specific country you want to use your phone, find here
or you can dial a code *#272* "you imei no." # and choose your country code for poland choose XEO and touch install then reboot and be free :good:
I recommend the dial code cause its safer and easier for me
IT WILL FACTORY RESET YOU PHONE SO MAKE A FULL BACK-UP :good:
Click to expand...
Click to collapse
Hi
I have the same issue. Bought a non working j500fn from ebay. It was not charging and not booting. Managed to fix it. However, now it appears that it is sim locked. It asks for a sim unlock code. I tried flashing different FWs, but with no result. The issue remains. Tried dialing the code you mention "*#272+IMEI*" but again nothing. By the I can not execute any codes. Even *#06# to show the IMEI does not work. I might have broken something, while trying different FWs.
Also I tried using SamsungToolPro but again couldn't get the unlock code. On the videos I watched, people presses a button "Read codes" in the SamsungToolPro and the tool showed them the unlock code. However, there is no such button for my model j500fn. I tried J300 and there is such a button and when I press it starts showing info for my phone j500fn, but when it comes to the retrival ot codes it just stops with an error that it tried to access an invalid memory or something.
Also I can not use an UK SIM, because I am in Bulgaria and don't have any active UK sim cards here with me.
Please help me. This is a rather old model so I am pretty sure there has to be a way to unlock it. Otherwise I will have to trow it away or re sell it for parts. The display is in perfect condition by the way. That way I bought it.

anyone ..... ? can't anyone help? Hereis full of android gurus, i thought this would be an easily one ...

HI
I am proud to anounce that after trying several firmware images i finally managed to unlock the sim of the phone.
The key element is to be able to run the hidden codes, which I wasn't for some reason. For example, *#06# didn't show me anything. When you get that fixed, you have to enter the hidden code *#0808# and select "DM+Modem+ADB” . After that just use the Z3X\Samsung\SamsungToolPRO - press "Unlock" and you are done.

SM-N975X??

A friend of mine gived to me a SM-N975X Note 10+ model. It looks like a demo unit model unable to read a sim and call.
I'd like flash a stock rom with Odin but I can't find a "SM-N975X" rom. Only "Combination file" that I dont know wath it is.
Some hints?
Thx a lot

Looks like that's a demo unit and nothing more then just a demo unit.
Searching the forum found the following thread that contains info which will answer your question.
https://forum.xda-developers.com/galaxy-note-10+/help/samsung-note-10-plus-sm-975x-t4090455

zappomax said:
A friend of mine gived to me a SM-N975X Note 10+ model. It looks like a demo unit model unable to read a sim and call.
I'd like flash a stock rom with Odin but I can't find a "SM-N975X" rom. Only "Combination file" that I dont know wath it is.
Some hints?
Thx a lot
Click to expand...
Click to collapse
You can unlock it with a password , if it's from a best buy store
I mean to unlock the demo retailer stuff that keeps cycling , and you would be able to use it normally , without the sim.
Step 1
From your Home Screen touch the “Apps” icon – it’s in the bottom-right corner.
Step 2
Scroll through your apps and find “Samsung Retail Mode” app ….. not be confused with the “RetailMode” app. Open up Samsung Retail Mode.
Step 3
Touch “Configuration settings”
Step 4
Enter the password: blue
and touch OK
To consider: maybe this phone wont be able to charge to 100% , it's top is 70%
Let us know if this worked for you !

Zappomax - Are you asking how to disable the store demo mode or how to make it so the phone can use a sim card and access the cell network.
Your original post made it sound like you wanted to use it on the cell network, but in hindsight you may have been asking about something else.

pvillasuso said:
You can unlock it with a password , if it's from a best buy store
I mean to unlock the demo retailer stuff that keeps cycling , and you would be able to use it normally , without the sim.
Click to expand...
Click to collapse
I've already done that.
Thx anyway
scottusa2008 said:
Zappomax - Are you asking how to disable the store demo mode or how to make it so the phone can use a sim card and access the cell network.
Your original post made it sound like you wanted to use it on the cell network, but in hindsight you may have been asking about something else.
Click to expand...
Click to collapse
What I'd like to do is using all the usual cell phone features like a stock phone (especially sim calls).
I heard about "combination file" rom but I don't know exactly if it is useful in this case

Unfortunately, no, it will be of no use, the demo units in any case are not capable to do what you want, it is not just a firmware thing, it is a phisical restriction what prevents them from being used as regular phones, no way to circumvent it, that's it, to finish this, that these demo units end in the hands of people is an irregular ocvurence, as all these units are intended to return to Samsung once their life cycle ends, they are nit intended to be sold in any case, so...

zappomax said:
What I'd like to do is using all the usual cell phone features like a stock phone (especially sim calls).
I heard about "combination file" rom but I don't know exactly if it is useful in this case
Click to expand...
Click to collapse
Adding a little more info the combination file requires a token in order to be flashed/used. This token is not free and costs a pretty hefty sum (per posts here on the forum).
Without this token (or "authorization for use" if this term fits better) you will not be able to use the firmware.

zappomax said:
What I'd like to do is using all the usual cell phone features like a stock phone (especially sim calls).
Click to expand...
Click to collapse
There is no hardware for that on those demo motherboards ( anthenas connectors and cables are missing there )