Develop Bugs

SIM unlocking through the registry? Possible?

So my phone (Cavalier) is sim locked to Vodafone Egypt. I have ordered a code online from mobileunlocked.com and paid 45 dollars for it, and it got to me in a few days, but the code did not work, it told me "Invalid unlock code" anyways I wrote the company and I am waiting for them to get back to me as they promise to either fix the problem or refund me the money.
Anyways in the meantime, as I wait for the company to get back to me, I was doing some playing around and I noticed that I am totally able to go into the registry and change things, without any problems or any restrictions (Manytimes the carrier will sim lock the phone and you would not even be able to change the registry)
So my question is, is there anywhere in the registry where the sim lock/unlock feature is located? and if so is there anway for me to go in there and change it so I can sim unlcok this phone?
I know this may seem like a silly question but I had to give it a shot.
Thanks guys!

The SIM lock is not in the Registry but buried deep in the ROM.
It's not in the interest of HTC or the Telcos to make it easy to unlock so it's usually heavily encrypted and is generally unique to each model of phone.
However there are some pretty smart programmers here in XDA Developers and many of the phones have software available here to SIM unlock them - check the appropriate form for your phone.
If you find a free SIM unlocker that works for you, please make a donation to the developer so that they feel their work is appreciated - it's not easy to crack!
Good luck!

If it is buried deep in the rom, then how come if you put a different rom on, the phone still stays locked?
Again, maybe a silly question?

not the rom, but the eprom or even some form of bios. not sure if these phones have miniture LPC ports or not. never cracked one open.
big ach said:
If it is buried deep in the rom, then how come if you put a different rom on, the phone still stays locked?
Again, maybe a silly question?
Click to expand...
Click to collapse

help with 2nd hand wildfire s problem

I am on o2
bought a 2nd hand wildfire s on t mobile
bought an unlock code from HTCimeiUnlock which came through.
unlock code seemed to work can use access phone with o2 sim.
cant register on o2 network says "your sim card does not allow a connection to this network"
Sim works totally fine in my o2 x10 mini pro.
and a t-mobile sim works fine in the wildfire s
thinking it mght be banned from o2 or the unlock code doesnt work
*Tried manually putting in APN detail and still nothing

Hello, I have the same issue, did you ever manage to solve this?

Sadly it seems that you have been swindled. Try looking for a XTC Clip(That S-OFF's your phone and also UNLOCK the SIM lock of the phone)

ok, swindled how? do you mean its not unlocked?? and for a beginner...xtc clip?

XTC Clip is a device that unlocks your phone security (which includes sim unlock), and that would be better than buying any codes from around internet ... You may go find it in some shop, maybe they do unlocking via xtc clip, OR buy a device unlock phone, and then resell it ?

imnw said:
ok, swindled how? do you mean its not unlocked?? and for a beginner...xtc clip?
Click to expand...
Click to collapse
If around where you live there are people in your city centre selling phone cases for about £5 with trolleys ask them if they do a phone unlock. The place is crawling with them in Cardiff.
Sent from my HTC Wildfire S A510e using xda premium

so general consensus - they didn't do it properly the first time...thanks - ill try somewhere else...do i need to tell the new place about this s'off thing???

imnw said:
so general consensus - they didn't do it properly the first time...thanks - ill try somewhere else...do i need to tell the new place about this s'off thing???
Click to expand...
Click to collapse
You need to do it in person. Did you google XTC Clip? It's really your friend...Even as a "beginner".

ok, so im going to go to the shop ( a different one today and try) myself...as for the xtc clip...i had a look but really wasnt sure how to make it work...
i think really that this may be a forum for people who know what they are doing..sorry... but thanks for the help.
Any other ideas let me know but thanks

ok, so here we go...
Went to the shop and they say the phone is unlocked. When i put an o2 sim card in, it does not require a pin when the phone switches on.
It works with tmobile sim, orange, virgin just not o2....
so it is unlocked just wont take o2.....
any ideas why?

Have you talked to 02 about it? Your simcard might just be too old for the phone.....
sent from my android powered tank using xda premium B-)

already have got a brand new 3g o2 sim in ...just got it last week from o2....phone also works with virgin just seems to be o2....
why??? please help..

imnw said:
already have got a brand new 3g o2 sim in ...just got it last week from o2....phone also works with virgin just seems to be o2....
why??? please help..
Click to expand...
Click to collapse
[edit]: lets keep it on other thread, i have answered there....

imnw said:
already have got a brand new 3g o2 sim in ...just got it last week from o2....phone also works with virgin just seems to be o2....
why??? please help..
Click to expand...
Click to collapse
Stab in the dark this,
try removing sim, Sd & battery....
then hold volume down for 2 secs, and power on while holding it...
You should be at the bootloader screen, see if theres an option to clear simlock, press power button to do so if its not done already, then try your O2 sim, if it does not work im at a loss, I would say its IMEI banned if thats the case.....

ok - ko ka - did as you said, when i selected simlock i got the following...
fat 32 init ok
open mccmnc file fail
open cid file fail
process done, reboot?
when i reboot, it still wont take the o2 sim...
and yes am working through the other thread also

Pantech Discover unlock

Hello people i'm a newbie to this forum and i'm a newbie to unlocking phones. I don't care about Rooting my phone as i don't think i have the skills to do it. However i just want to unlock a Pantech Discover from AT & T so it will work on T-Mobile can anybody give me the unlock code so i can unlock the Discover so it will work with T-Mobile. Thanks for any and all help

cowboyy2087 said:
Hello people i'm a newbie to this forum and i'm a newbie to unlocking phones. I don't care about Rooting my phone as i don't think i have the skills to do it. However i just want to unlock a Pantech Discover from AT & T so it will work on T-Mobile can anybody give me the unlock code so i can unlock the Discover so it will work with T-Mobile. Thanks for any and all help
Click to expand...
Click to collapse
I have tried unlocking my discover and I called AT&T they told me that I couldn't unlock the phone because it was strictly for AT&T. Not sure if that is true or not because I looked at unlocking sites and they say that they can unlock the phone but im not too sure how true that is.
Sorry if that was not any help but being as I have the same phone and tried the calling at&t way of doing it thought I would share that with you.

i tried
TheAtreus said:
I have tried unlocking my discover and I called AT&T they told me that I couldn't unlock the phone because it was strictly for AT&T. Not sure if that is true or not because I looked at unlocking sites and they say that they can unlock the phone but im not too sure how true that is.
Sorry if that was not any help but being as I have the same phone and tried the calling at&t way of doing it thought I would share that with you.
Click to expand...
Click to collapse
I tried three different 'pay to get the code to unlock' websites. One flat out said that it can not be unlocked and refunded my money. the other two tried to help me but nothing worked. they all gave the same unlock code, so I kinow that they at least tried to generate one. am waiting to see if I can get refunds from the other two.
its strange - I can root the phone (which I am not really interested in doing), but can't unlock it. Mmmmmm.

Unlocked - WORKING
I've been noticing a few too many people having a hard time with some of the sites someone mentioned. I've had to use one of them myself a few weeks ago for a ZTE Merit from TracFone. Luckily, I was given a working code and move about my way. This phone however, due to limited support has been an obstacle to root and unlock. I am proud to say that I FINALLY have both and even managed to make a working mini-sim after two tries.
Maybe I could help you guys out. I unlocked mine and have it working 100% with Simple Mobile and T-mobile.
All I need is the phones IMEI. I spent hours last night trying using different methods and came really close to paying only to find out the Discover wasn't supported for some reason or another. A buddy came up with a minor tweak in the way the IMEI was loading into the unlocking software to get it working.
PM if anyone is interested. Here are some screenshots.

Hi all.
I've just bought unlocked Pantech Discover on Ebay. Can you tell me where can i find unlock code or what do i have to do if i want to update ROM and don't want to lock it again?

RE: Flip956
Hey, Can you still unlock AT&T discovers? If so please let me know so I can send you the IMEI for and get this unlocked so I can use it on metro.. Thanks SOOOO MUCH!! :fingers-crossed:
Flip956 said:
I've been noticing a few too many people having a hard time with some of the sites someone mentioned. I've had to use one of them myself a few weeks ago for a ZTE Merit from TracFone. Luckily, I was given a working code and move about my way. This phone however, due to limited support has been an obstacle to root and unlock. I am proud to say that I FINALLY have both and even managed to make a working mini-sim after two tries.
Maybe I could help you guys out. I unlocked mine and have it working 100% with Simple Mobile and T-mobile.
All I need is the phones IMEI. I spent hours last night trying using different methods and came really close to paying only to find out the Discover wasn't supported for some reason or another. A buddy came up with a minor tweak in the way the IMEI was loading into the unlocking software to get it working.
PM if anyone is interested. Here are some screenshots.
Click to expand...
Click to collapse

Yep

I helped a lot
thanks

[Q] Problem with sim unlocking and the phone itself

I have two problems with my phone, first one is how about unlocking the sim card.
1. I have already gone through http://forum.xda-developers.com/showthread.php?t=2283068 these steps for one of my sim cards, it worked for the first one. But when I used another sim card it completely blocked it and didn't give me access to the net(phonecall) at all.
2. My S4 is a SGH-M919 T-mobile version, I would love to change/replace the T-mobile out of the phone, but don't know how. The phone eats my battery quite fast, and the signals are even worse, as long as there is a roof over my head I can't get a single dot of signal. :crying:

Yourfavoritenoob said:
I have two problems with my phone, first one is how about unlocking the sim card.
1. I have already gone through http://forum.xda-developers.com/showthread.php?t=2283068 these steps for one of my sim cards, it worked for the first one. But when I used another sim card it completely blocked it and didn't give me access to the net(phonecall) at all.
2. My S4 is a SGH-M919 T-mobile version, I would love to change/replace the T-mobile out of the phone, but don't know how. The phone eats my battery quite fast, and the signals are even worse, as long as there is a roof over my head I can't get a single dot of signal. :crying:
Click to expand...
Click to collapse
1. Cant help there dont understand much in that
2. My S4 is I9505 and its from T-mobile i flashed my phone to 4.3 google edition nexus 4 ROM now have more battery time and the phone is faster!
But you will lose some of the options (like scrolling with your eye and stuff like that, not a big lose for me) :good:

SaintDaniel said:
1. Cant help there dont understand much in that
2. My S4 is I9505 and its from T-mobile i flashed my phone to 4.3 google edition nexus 4 ROM now have more battery time and the phone is faster!
But you will lose some of the options (like scrolling with your eye and stuff like that, not a big lose for me) :good:
Click to expand...
Click to collapse
Well I would like to know how to solve the signal to get better as well, I think the battery problem might get solved when the signal gets better as well. Any other ideas

I have a question about Sim unlocking too. Can I unlock my phone with an unlock code without having to put another carriers Sim card?
Sent from my SGH-M919 using XDA Premium 4 mobile app

XxKINGxX2580 said:
I have a question about Sim unlocking too. Can I unlock my phone with an unlock code without having to put another carriers Sim card?
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
My first =3=

XxKINGxX2580 said:
I have a question about Sim unlocking too. Can I unlock my phone with an unlock code without having to put another carriers Sim card?
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
You can unlock it, but you can't exactly confirm without a doubt that the unlock worked. The free method here showed all the right things for me when I used it, but my AT&T SIM still wasn't working. I would have never known that I didn't successfully unlock if I had T-Mobile service and no other SIM card.

i'm having a similar problem.
to give a little background, I took the task of unlocking a friends Tmo S4 to use with Att, since his work provides att service. his brother works at tmobile so he got that version of the phone.
does the 40 day rule still apply? it's about two weeks old. it shouldn't, since it was purchased outright. also his brother couldn't do anything with it and he works at a corporate store. maybe it's a lemon?
I've tried the above method, and i've tried a few of the root methods. absolutely nothing works. the system/unlock.sh script has a line for IMEI: and unlock code: but no numbers after the colons. and the -n 8 /dev/block method gives me all kinds of info except the unlock code you're supposed to then do some simple math with.
if any of you guys have some helpful links i'd really appreciate it. I've searched and searched, posting a Q (or replying to one) is usually a last resort.
Thanks.

Walzbeer said:
i'm having a similar problem.
to give a little background, I took the task of unlocking a friends Tmo S4 to use with Att, since his work provides att service. his brother works at tmobile so he got that version of the phone.
does the 40 day rule still apply? it's about two weeks old. it shouldn't, since it was purchased outright. also his brother couldn't do anything with it and he works at a corporate store. maybe it's a lemon?
I've tried the above method, and i've tried a few of the root methods. absolutely nothing works. the system/unlock.sh script has a line for IMEI: and unlock code: but no numbers after the colons. and the -n 8 /dev/block method gives me all kinds of info except the unlock code you're supposed to then do some simple math with.
if any of you guys have some helpful links i'd really appreciate it. I've searched and searched, posting a Q (or replying to one) is usually a last resort.
Thanks.
Click to expand...
Click to collapse
Samsung unlock code algorithms are not easy to come by and not done with simple math.
If phone was purchased outright all you have to do is call Tmobile. They will provide you with the code free. It may take some time but it is free.
I do unlocking as a side business and unlocked over 400 s4's to date with z3x programming device. Of course if you are doing just one it's not feasible to spend $100 for the device.
Depending how much you earn an hour, your other option if you want fast service is to buy the unlock code on eBay. The tmobile one is expensive at around $30-$49. There is one dealer on ebay that does remote unlocking for $10. You may consider him as he uses the same device I use and has you connect your phone to your PC to initiate remote unlocking.
Honestly I wouldn't mess with the system files especially NV Data area because one screwup and you will delete your IMEI rendering the phone useless unless you buy the z3X to repair.

Thanks for the input and options.

Lg g2 sprint ls980 no sim card - how to unlock it?

After hours of reading i decide to post im really stresfull with this situation. i bought a phone trough ebay i live in dominican republic but when i insert the SIM CARD say " NO SIM CARD" like if i had not put anything. i saw in the post that sprint has somehting modified to dont let no one activate the phone until we call them. i was trying to call them but there are asking me for a phone number and the phone doesnt have any phone number like the CDMA always do.
PLEASE!! there is any way to remove that security and unlock the phone without call sprint ?
if there is any how can i do that because i dont want to lose the money that i paid and im very needing this phone.
i tried lot of thing like the ##3282 and enable the LTE , BAND 26 AND 41 also i have my msl code but nothings appears to work.
Do i need to sell the phone for parts or i will need to wait till someone resolve this problem bz as i think is a software solution ....
Thanks for all

kiorix said:
After hours of reading i decide to post im really stresfull with this situation. i bought a phone trough ebay i live in dominican republic but when i insert the SIM CARD say " NO SIM CARD" like if i had not put anything. i saw in the post that sprint has somehting modified to dont let no one activate the phone until we call them. i was trying to call them but there are asking me for a phone number and the phone doesnt have any phone number like the CDMA always do.
PLEASE!! there is any way to remove that security and unlock the phone without call sprint ?
if there is any how can i do that because i dont want to lose the money that i paid and im very needing this phone.
i tried lot of thing like the ##3282 and enable the LTE , BAND 26 AND 41 also i have my msl code but nothings appears to work.
Do i need to sell the phone for parts or i will need to wait till someone resolve this problem bz as i think is a software solution ....
Thanks for all
Click to expand...
Click to collapse
I think you should wait a little longer before selling it for parts as I think this is definitely a software solution.

tHANKS ill think i will wait a little longer
Hathoid said:
I think you should wait a little longer before selling it for parts as I think this is definitely a software solution.
Click to expand...
Click to collapse

Need unlock code from Sprint for international use... they unlock over network. Still, shouldn't say no SIM card, try another.

Steamer86 said:
Need unlock code from Sprint for international use... they unlock over network. Still, shouldn't say no SIM card, try another.
Click to expand...
Click to collapse
I've tried 3, all of them say no sim card.

Bottom line you shouldn't have bought the Sprint model. Sprint sends out the unlock code/unlocks the phone over their network and you being in the D.R, you're out of luck.

LordLugard said:
Bottom line you shouldn't have bought the Sprint model. Sprint sends out the unlock code/unlocks the phone over their network and you being in the D.R, you're out of luck.
Click to expand...
Click to collapse
It's not as complex as you are making it out to be, don't crush people's hope if you don't have facts behind it. Yes it wasn't a good idea to get the sprint one, but the deed is already done. Both the S4 and the HTC ONE were unlocked without sprint sometime after their release, I believe it will be the same case for the G2.

Hathoid said:
It's not as complex as you are making it out to be, don't crush people's hope if you don't have facts behind it. Yes it wasn't a good idea to get the sprint one, but the deed is already done. Both the S4 and the HTC ONE were unlocked without sprint sometime after their release, I believe it will be the same case for the G2.
Click to expand...
Click to collapse
...and you have the "facts" that the G2 will be unlocked or you just want to "believe"? This belief of yours is based on what facts exactly? The HTC One and S4 are/were much more massively popular devices and attract much more attention. You are chastising me for being a realist yet all you're giving the O.P is your belief, just that.
I'm not crushing anyone's hope (where in blazes did you even get that from ). Why suffer through the wait for an unlock when the choice is there for O.P to get rid of it for as much as he/she can still get for it and get the GSM version.

kiorix said:
After hours of reading i decide to post im really stresfull with this situation. i bought a phone trough ebay i live in dominican republic but when i insert the SIM CARD say " NO SIM CARD" like if i had not put anything. i saw in the post that sprint has somehting modified to dont let no one activate the phone until we call them. i was trying to call them but there are asking me for a phone number and the phone doesnt have any phone number like the CDMA always do.
PLEASE!! there is any way to remove that security and unlock the phone without call sprint ?
if there is any how can i do that because i dont want to lose the money that i paid and im very needing this phone.
i tried lot of thing like the ##3282 and enable the LTE , BAND 26 AND 41 also i have my msl code but nothings appears to work.
Do i need to sell the phone for parts or i will need to wait till someone resolve this problem bz as i think is a software solution ....
Thanks for all
Click to expand...
Click to collapse
I also bought a ls980 in ebay, but still is locked.

Steamer86 said:
Need unlock code from Sprint for international use... they unlock over network. Still, shouldn't say no SIM card, try another.
Click to expand...
Click to collapse
Pretty sure sprint g2 say no sim card because it's locked. Usually a phone would say invalid or ask for a code but not the g2. Cmiiw

Heh, learn something new with this phone every day.

Please help with the sprint unlock
Steamer86 said:
Heh, learn something new with this phone every day.
Click to expand...
Click to collapse
Hi,
Happy New Year everyone!!
I'm in India and am getting a great deal on a Sprint LG G2. Only thing is that i have yet to find an unlock for it. Do the codes given by the unlock sites work? Or does anyone have any sort of idea/clue?
Please keep this thread alive. The price difference for me is substantial and I have kept my purchase of the LG G2 on hold for the moment.
If anyone can help I would be really grateful.
Regards,
George Mathews

sometimes they can also give you unlock instructions thro email so what I would do is call sprint and ask whats the worse they can say? all they can really say im sorry but we cant help? I would really just call sprint

I just got the tmobile model I paid 100 bucks more than the sprint model on craigslist. I dont have sprint service and they told me that i have to have a 2 year contract with them. That they wont do prepaid plans to this phone.. Ridiculous but that's how they work. As Sprint i dont think they will unlock your phone since you didn't bought it from them.

George Matt said:
Hi,
Happy New Year everyone!!
I'm in India and am getting a great deal on a Sprint LG G2. Only thing is that i have yet to find an unlock for it. Do the codes given by the unlock sites work? Or does anyone have any sort of idea/clue?
Please keep this thread alive. The price difference for me is substantial and I have kept my purchase of the LG G2 on hold for the moment.
If anyone can help I would be really grateful.
Regards,
George Mathews
Click to expand...
Click to collapse
Sprint's international phones get unlocked OTA (Over The Air) while registered on the network, meaning the unlock codes/mechanism are sent to the phone from Sprint itself. Unlocker websites will not work.
Other alternative is to wait for someone to develop an unlock solution like they did for the Sprint HTC One and Galaxy S4.
...or get a proper GSM LG G2 variant.

Oh, you guys are going to laugh... it's so simple... edit /system/build.prop and change ro.build.target_operator=SPR to ro.build.target_operator=OPEN
THAT'S ALL FOLKS! I see this is from last month, but some may not know that yet, and I came here by Google search, because my stupid phone which is an active Sprint phone started showing no SIM card, and I can't figure out how to make it go away.

sudosurootdev said:
Oh, you guys are going to laugh... it's so simple... edit /system/build.prop and change ro.build.target_operator=SPR to ro.build.target_operator=OPEN
THAT'S ALL FOLKS! I see this is from last month, but some may not know that yet, and I came here by Google search, because my stupid phone which is an active Sprint phone started showing no SIM card, and I can't figure out how to make it go away.
Click to expand...
Click to collapse
If you also read through the WHOLE thread you'll see the issues with that method...

easy fix for no sim card sign or not recognized.
kiorix said:
After hours of reading i decide to post im really stresfull with this situation. i bought a phone trough ebay i live in dominican republic but when i insert the SIM CARD say " NO SIM CARD" like if i had not put anything. i saw in the post that sprint has somehting modified to dont let no one activate the phone until we call them. i was trying to call them but there are asking me for a phone number and the phone doesnt have any phone number like the CDMA always do.
PLEASE!! there is any way to remove that security and unlock the phone without call sprint ?
if there is any how can i do that because i dont want to lose the money that i paid and im very needing this phone.
i tried lot of thing like the ##3282 and enable the LTE , BAND 26 AND 41 also i have my msl code but nothings appears to work.
Do i need to sell the phone for parts or i will need to wait till someone resolve this problem bz as i think is a software solution ....
Thanks for all
Click to expand...
Click to collapse
Edit prop file in systen folder and remove Spr in: xxx.carrier=SPR
Basically delete SPR at the end of the line. And your sim will work. Verified.
Hope this helps someone. I get so much from this forum and hopefuly I can give back.

How can I edit that part?

kiorix said:
How can I edit that part?
Click to expand...
Click to collapse
Download ROM toolbox which has a built in build.prop editor (You must be rooted to do this). If you're doing this, change the OPEN to spr (lower case) and then reboot, otherwise you will get system UI crashes.
But... there is now a permanent unlock for the ls980. Please check the Sprint section.
http://forum.xda-developers.com/showthread.php?t=2655133