Hello everyone! I have spent so much time troubleshooting and have been so disappointed from this issue. Okay I will try to be as detailed as possible.
The phone in question is galaxy s20 ultra, originally sprint branded. I purchased the phone from a friend, that used it on sprint and it was totally paid off, and he initially stated at that time it was unlocked.
I insert my cricket wireless sim into the s20 ultra and it indicates it's locked and to contact the carrier.
So we called sprint , he stated what we were trying to do, which was use the s20 ultra with a cricket sim. They went through some steps , I can recall something about uicc unlock, and then the sprint rep said to insert the cricket sim, and once we did, no more unlock notice, no error messages or anything at all. Totally good. Worked great for a month until I decided in hopes of overall better service, data speeds and pricing, to try out US mobile.
Sooo now the real issue, once I placed in the black US mobile sim (verizon) , I had manually update apn settings with us mobile rep. Basically everything was good, top right corner of screen reads Verizon , however, only issue was no volte, so could not use data while on a call. The rep did some more settings ,which I cant clearly recall now, it was extensive, but now the volte is good, can access data while on a call, but top corner reads roaming indicator off.(eye sore) also after extensive settings changes and resets that us mobile rep performed , caused OMADM active your device, but it keeps failing and gives an error. And a notification for it stays on top corner. Only to get rid of it temporarily is to force stop but it comes back once phone re starts , any suggestions on how to remove these notifications?
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Hi everyone, I have searched XDA and Google to no end for a fix.
I just got this phone used like new off eBay yesterday from a reputable mobile dealer. I have spent hours playing with it and testing it and can confirm everything on it works beautifully!... except mobile service. >_____________<
Coverage is terrible to nonexistent at least half the time I use it, whether at home or out and about. I got a new SIM, same problem. My previous phone had great coverage and it was an unlocked AT&T iPhone 4.
The service bar indicator often shows a white circle with a cross. When I try to register it with T-Mobile, an alert appears in the top bar saying "Mobile Data is currently turned off" -- even though it isn't-- while the phone shows "Registering on T-Mobile..." for a minute, until finally saying "Unable to connect. Try Later"
It has a good IMEI, locked to T-mobile, stock unrooted Android 4.3 and is in excellent all around condition. I troubleshooted this with T-Mobile for two hours yesterday at the store. We are all trumped. They said they would have a network engineer check things out on their end and I should get a call back in two days from tech support.
Please help! I have already contacted the eBay seller about the phone but if at all possible I would like to fix the issue myself if I can.
Just noticed something. Without SIM card inserted the phone shows several bars of cellular service. With the SIM card in, the cellular service bar shows a white circle with a slash.
Maybe the SIM reader is toast?...yet, the phone acts like there is a SIM in when it is in...in other words it doesn't say insert SIM or no SIM or anything like that.
So my mom upgraded her original Note (i717) to the Note 4 (N910A). Came out of the box with the NK3 update.
The problem is that whenever she uses the phone, it will randomly drop the call; can be 20 minutes or 2 minutes before it drops. Sometimes there will be two beeps when attempting to call back. Also the signal bars will completely drop and the no signal icon will appear. HOWEVER, after ending the call, the signal miraculously comes back.
I've disable HD voice call, and that did absolutely nothing. Using the hidden menu and disabling LTE (thanks AT&T for butchering the regular settings) seems to have stabilize the calls now, but for a flagship phone, not having LTE is a big minus.
She has considered returning the Note 4 for the iPhone 6+, which is a complete step backwards in my book.
Anyone else having similar problems?
cee43ja1 said:
So my mom upgraded her original Note (i717) to the Note 4 (N910A). Came out of the box with the NK3 update.
The problem is that whenever she uses the phone, it will randomly drop the call; can be 20 minutes or 2 minutes before it drops. Sometimes there will be two beeps when attempting to call back. Also the signal bars will completely drop and the no signal icon will appear. HOWEVER, after ending the call, the signal miraculously comes back.
I've disable HD voice call, and that did absolutely nothing. Using the hidden menu and disabling LTE (thanks AT&T for butchering the regular settings) seems to have stabilize the calls now, but for a flagship phone, not having LTE is a big minus.
She has considered returning the Note 4 for the iPhone 6+, which is a complete step backwards in my book.
Anyone else having similar problems?
Click to expand...
Click to collapse
Replace Sim card or get back to store and get new phone.
Clicking from notecable N910A
norbarb said:
Replace Sim card or get back to store and get new phone.
Clicking from notecable N910A
Click to expand...
Click to collapse
Hopefully it's just the sim card. Pretty sure if it is the phone itself, my mom will switch to the 6+ immediately and not play the lottery game on getting a flawless Note 4.
Edit: After some more searching, the culprit may be the NK3 update. Which sucks because you cannot avoid the upgrade, and it will automatically install after the third dismissal.
cee43ja1 said:
Hopefully it's just the sim card. Pretty sure if it is the phone itself, my mom will switch to the 6+ immediately and not play the lottery game on getting a flawless Note 4.
Edit: After some more searching, the culprit may be the NK3 update. Which sucks because you cannot avoid the upgrade, and it will automatically install after the third dismissal.
Click to expand...
Click to collapse
You can flash back to NIE, regardless if your device came w NK3, and you can disable the updater service w the debloater program.*
Link to NIE firmware:*http://forum.xda-developers.com/showthread.php?p=56230799
Link to debloater:*http://forum.xda-developers.com/showthread.php?p=58068827
xlr8shun said:
You can flash back to NIE, regardless if your device came w NK3, and you can disable the updater service w the debloater program.*
Link to NIE firmware:*http://forum.xda-developers.com/showthread.php?p=56230799
Link to debloater:*http://forum.xda-developers.com/showthread.php?p=58068827
Click to expand...
Click to collapse
Much appreciated. Hopefully this will stop the random drops for good, until lollipop comes out.
Update: phone is still dropping calls, even with the NIE update. Time to head to the AT&T store now. Gonna have them look at the account and see if VoLTE is activated, and disable it completely.
Also, using the hidden menu, switching to GSM only will not stick. It somehow switches back to GSM/LTE on its own.
cee43ja1 said:
Update: phone is still dropping calls, even with the NIE update. Time to head to the AT&T store now. Gonna have them look at the account and see if VoLTE is activated, and disable it completely.
Also, using the hidden menu, switching to GSM only will not stick. It somehow switches back to GSM/LTE on its own.
Click to expand...
Click to collapse
Did you get to At&t store and replace sim card ? I had same problem all i got was sim with secure element , they seems to work little better.
norbarb said:
Did you get to At&t store and replace sim card ? I had same problem all i got was sim with secure element , they seems to work little better.
Click to expand...
Click to collapse
We haven't gone yet, but I am going to request a secure element sim card and have them look at VoLTE.
Even the AT&T forum users have the same problem.
https://forums.att.com/t5/Samsung-D...ropping-calls-and-losing-network/td-p/4197338
Edit: swapped the sim card with a new one, and it still drops the call. AT&T is saying that disabling VoLTE would permanently drop phone calls. I call BS, but who knows.
Edit 2: got off the phone with a knowledgeable AT&T tech. Told him that I rolled back to the NIE firmware, eliminating all traces of HD voice/VoLTE. He remoted into the phone to see it too. Confirmed that we are not in a VoLTE area, and that VoLTE is not active on the account. He also agrees that VoLTE is immature and buggy, and that the backbone needs to be mature and up to date before launching.
If it would drop calls again, we would have to call back immediately so they can see it in the system as it happens.
cee43ja1 said:
We haven't gone yet, but I am going to request a secure element sim card and have them look at VoLTE.
Even the AT&T forum users have the same problem.
https://forums.att.com/t5/Samsung-D...ropping-calls-and-losing-network/td-p/4197338
Edit: swapped the sim card with a new one, and it still drops the call. AT&T is saying that disabling VoLTE would permanently drop phone calls. I call BS, but who knows.
Edit 2: got off the phone with a knowledgeable AT&T tech. Told him that I rolled back to the NIE firmware, eliminating all traces of HD voice/VoLTE. He remoted into the phone to see it too. Confirmed that we are not in a VoLTE area, and that VoLTE is not active on the account. He also agrees that VoLTE is immature and buggy, and that the backbone needs to be mature and up to date before launching.
If it would drop calls again, we would have to call back immediately so they can see it in the system as it happens.
Click to expand...
Click to collapse
Well it's obviously not an across the board thing or everyone would be having the issue. I suspect it's probably a bad radio in the phone. I would definitely have them swap the sim and phone as well as look at the account to make sure all the correct a count codes are present. And disabling VoLTE is definitely a good idea
^^^^^^^ seems like something wrong with hardware.
Looks like it might have to be swapped out for a new Note 4 then. 6+ would be the route to go to after all of this, but I don't believe in sweeping the problem under the rug.
Big fail on Samsung on QC. Even the rep at the AT&T store flat out told me that she believes Samsung makes their product only last two years before they start to break apart or have problems. Sure, there may be a few lemons with any product, but I don't even know how this particular unit passed QC.
Edit: AT&T Device Support Center has authorized an order for a new Note 4 that will ship in 1-2 days. Representative also has a Note 4, a launch model, and has not experienced any dropped calls or loss of signal.
New unit is now displaying Out of Service Area and dropping signal when calling. Two lemons? I have it recorded on my phone showing when it drops.
Sim card is not a problem. I have tested it in my HTC One, and it did not drop at all. Using my sim card in the Note 4 dropped a voicemail call after a minute.
AT&T submitted a case ticket to us. It was completed and it was complete BS. They wanted us to get a microcell, but that won't fix anything if the phone can't hold a call in the first place. Now we're getting a THIRD unit.
I have same problem with my note 4. It's the same slec. I live in the UK usingthe Three network. What shall I do??
I have a Samsung Galaxy Edge 6 with T-Mobile from T-mobile, love the phone, but I lost my job and the bill got out of control so I have not paid in like 3 months I think now.
It was not too big of a deal since my main number is a Google Voice number and I use Google Hangouts to make phone calls and text messages by default.
Its perfect when I am at home on wi-fi but as soon as I leave and not within wi-fi of course I get no internet functionality.
For a while I saw the carrier logo at the top of my phone "T-Mobile" but now it just says "searching" where it used to say that in the upper part of the screen on every screen. (I may have switched a setting causing this or they may have blacklisted my phone I am not sure how to tell).
The phone is not carrier unlocked however if I was to go to Walmart or even a T-Mobile store, tell them I don't have the phone on me but I just want to purchase a pre-paid SIM, could I do that and would it work on my phone to get back on the T-mobile or other carriers network?
Since I use Google Hangouts for my texts and calls it is very important for me to have data. I am sure 5GB would be fine but I want to purchase the cheapest SIM which has any kind of data to see if it even works first. I do not care what number it gives me since I will not be using it for outgoing or incoming calls.
My concern is that if I go with T-Mobile pre-pay, when I put SIM in, it may reject it automatically because they may have sent some kind of SIM lock command since it is not showing carrier anymore OR they may look up my IMEI and see that I have an outstanding bill with them and not allow the SIM.
Any suggestions besides the obvious "pay your bill" would be greatly appreciated! When I can afford to pay the bill I will :cyclops:
Short answer, yes it will work.
Sent from my SM-G925T using Tapatalk
Ok great thank you! Will go in and get a T-mob SIM tomorrow. Or actually, does anyone have advice of where to get the cheapest SIM so I can try this to make sure it works first? I think for $30 you can get 5GB data and a little talk from T-Mob is there anything cheaper? I am super-broke right now lol. I just need the data no talk.
Actually it depends on if the phone was part of the bill. If it wasnt payed off and you didnt pay them it will get blacklisted and it wont work with any carrier in the us. But if the phone was paid outright then you should be fine.
See that is what I am talking about. The phone AND Galaxy Gear S with activated SIM both were not paid off and bill is at $600 and it used to say "T-mobile" for carrier on top of phone screen now it just says "Searching" thus I am pretty sure that is a sign of being blacklisted. Even if phone is blacklisted cant I do something to make it use a prepaid SIM? Can I spoof the IMEI? Is that how they blacklist it?
Alex9090 said:
Short answer, yes it will work.
Sent from my SM-G925T using Tapatalk
Click to expand...
Click to collapse
I got around to trying this and no, it did not work. In fact I went to one of those third party T-mobile places which is an authorized dealer but he was still cool to talk about it with and had access to the T-mobile database.
He asked for my phone, went to the dialer app on the phone, put in a code with the numeric keypad, and it pulled up two bar codes and numbers (I think the IMEI).
He then went on his computer and put in my IMEI or whatever number was there and sure enough it said it was blacklisted.
I had a feeling this was the case when my phone went from showing the carrier logo on the top of the screen they it said "searching" after about 3 months on non payment.
So when I tried to purchase a new prepaid SIM and put it in the phone and phone restarted, instead of saying "searching" it now says "no service".
There has to be a work around for this. Maybe changing the phones IMEI is the only way but if there are other alternatives I would like to know. I can program and have been writing code since I was 12 years old but not sure if I need special hardware to flash and internal EEPROM or something like that. Any hep is greatly appreciated!
I hear there are people that I can pay to do it but I enjoying learning things like this on my own so I would really like to do it myself if possible?
Changing the imei might be possible but for legal and policy reasons that can not be discussed here
I see tons of ways to do it with a Google search super easy. But it seems TWRP might do it or at least let me backup everything including the system partition so I dont lose anything and can always go back?
Where can I get and learn more about TWRP and must I be rooted?
Can we currently root Samsung GS6 with Android OS 5.1.1 ?
So I have contacted spring 20 times, they have confirmed my SM-G920p is domestically unlocked. Getting a sim from AT&T and it says invalid Sim. I've searched everywhere, some forums say do a paid service (im fine with) others say unlocking from sprint works....which is obviously doest for my phone.
Anyone actually sucsefully unlocked a spring galaxy s6 (g920p.20) and used it on AT&T network? If so can you give me the details?
Thanks!
Question. Why on this phone in the network mode does it have options to use CDMA, LTE/CDMA, GSM, GSM/UMTS?
GSM AT&T works fine Idk why ppl say it doesn't work I have H2O which uses AT&T and I get LTE. Use a website called willmyphonework to find answers on stuff like this
This is the first website I've created to post about this topic. I've spent the past few days researching and testing out things. So far I've only found a few post online saying it works....I've not heard much about the sm-G920P NOT working on other networks. Also the phone itself is not made for CDMA or GSM ONLY.
One thing is for sure, one of my sm-G920p is domestically unlocked from Sprint. They also gave me a MLS or MSL# or whatever even though I dont think it matters. This phone will not take any AT&T sims. It says invalid sim.
With another sm-G920p, I rooted it and unlocked it another way...obviously not involving sprint. I will test it this evening to see if it accepts AT&T's sim card and will post my findings.
The whole reason for this is we have a business that goes though phones due to physical damage. I have a couple left over phones that I've replaced the screen on myself. I would like to let my sister and fiance use the galaxy S6s as they have old phones! All of these phones have been paid in full FYI and our account is in great standing.
Okidoki. I have spent some time working on unlocking a Spring Galaxy S6 SM-G920P with stock firmware ending in QB1. At first I found out that US carriers now have to unlock your phone if you ask. At first I went that route as it seemed legit. I called Spring and got a guy on the phone from tech support. I gave him the DEC# on the back of the phone and he said "Great thanks.....its unlocked." I though sick!...went to AT&T next day and got a nano sim activated. Once entered the phone read "Invalid Sim". I got back on the phone with sprint quit quickly while at AT&T. The lady said she had to send in a ticket to get it unlocked and the guy before definitely did not unlock it. Went home and went online again. Next day the lady called me at 11am and said it was domestically unlocked. I called back an hour later and talked to someone else confirming it was unlocked. Went to sprint, installed new activated sim...."Invalid Sim". Next thing was to root it and try unlocking it myself.
I found out how to root the phone and install custom firmware and whatnot. Its fairly easy, similar to computer basics. Once that was done I unlocked the phone with a little help which was not hard to find. I went to AT&T and BOOM!!! Phone worked RIGHT away. I was blown away. The phone had voice, data, msg, voice mail 3g and lte. Had my fiance put in her google info.....FYI this is my fiances AT&T account and a spare S6 I had that i fixed the screen on. Anyway she put her google account into it and restarted the phone. At the "samsung" logo login little red letters at the top say something about FRP is locked. The way you bypass this is right after you unlock the phone you need to go into the developer options and enable OEM Unlock. This fixes the lockout. But to get back into the phone once you lock it out you have to re root the phone with its original firmware.
It has worked all evening. Thanks Jhoward you gave me that last little boost today to get it working. I know the SM-G920P phone works in every network so I have no idea why people think it can only work on one network. Something I did learn is that these are little computers.....pretty cool!
If anyone needs any more info pm me.
http://i.imgur.com/ch8TUWg.png
http://i.imgur.com/ijY1sed.png
They lie. It took me 5 calls and many hours to get one of my 2 s6 unlocked. There is some problem with original activation date on some of the phones.
They said both were unlocked but only one worked.... Until finally tech support fixed the activation date.
Now both work on T-Mobile very well
sprint is a little ***** when it comes to unlocking devices. i have never successfully unlocked a device from them. they will run circles of confusion around you just so you won't unlock.
G920P to GSM
localphit said:
Okidoki. I have spent some time working on unlocking a Spring Galaxy S6 SM-G920P with stock firmware ending in QB1. At first I found out that US carriers now have to unlock your phone if you ask. At first I went that route as it seemed legit. I called Spring and got a guy on the phone from tech support. I gave him the DEC# on the back of the phone and he said "Great thanks.....its unlocked." I though sick!...went to AT&T next day and got a nano sim activated. Once entered the phone read "Invalid Sim". I got back on the phone with sprint quit quickly while at AT&T. The lady said she had to send in a ticket to get it unlocked and the guy before definitely did not unlock it. Went home and went online again. Next day the lady called me at 11am and said it was domestically unlocked. I called back an hour later and talked to someone else confirming it was unlocked. Went to sprint, installed new activated sim...."Invalid Sim". Next thing was to root it and try unlocking it myself.
I found out how to root the phone and install custom firmware and whatnot. Its fairly easy, similar to computer basics. Once that was done I unlocked the phone with a little help which was not hard to find. I went to AT&T and BOOM!!! Phone worked RIGHT away. I was blown away. The phone had voice, data, msg, voice mail 3g and lte. Had my fiance put in her google info.....FYI this is my fiances AT&T account and a spare S6 I had that i fixed the screen on. Anyway she put her google account into it and restarted the phone. At the "samsung" logo login little red letters at the top say something about FRP is locked. The way you bypass this is right after you unlock the phone you need to go into the developer options and enable OEM Unlock. This fixes the lockout. But to get back into the phone once you lock it out you have to re root the phone with its original firmware.
It has worked all evening. Thanks Jhoward you gave me that last little boost today to get it working. I know the SM-G920P phone works in every network so I have no idea why people think it can only work on one network. Something I did learn is that these are little computers.....pretty cool!
If anyone needs any more info pm me.
http://i.imgur.com/ch8TUWg.png
http://i.imgur.com/ijY1sed.png
Click to expand...
Click to collapse
Hello localphit, can you help me do the same with my Galaxy S6 G920P. Mines in currently on android 7.0 Patch January 1, 2018. Appreciate all the help that you can give.
I'm looking to get a Note 10+ phone that can be bootloader unlocked & rooted, but I'm tied to Verizon.
Anyone using either the N976F or N975F on VZW? Any issues or tricks in order to get them to accept something other than the "V" variant that is locked down and may never have root?
Trying to figure out which of these 3 Note 10+ phone variants to go with:
N975F
N976F
N9750/DS
TIA.
UPDATE: Not officially, but it seems possible. Keep reading below for my experience...
I'm on the n9750 on Verizon and it seems to be working well. I just got it so I haven't got to fully test quite yet.
Just for reference, I wanted to post this for others since I wasn't able to find true compatibility details other than VZW's ironfisted "certified" devices (ie the locked SM-N975U):
I recently purchased a Samsung Note 10+ (SM-N975F/DS) international variant online, and was able to get successfully attached to my VZW account. I have a grandfathered unlimited data plan, and was replacing an existing phone on my account.
Here's how it went down:
Initially when I tried to activate and attach the N10+ to my account via VZW website, it told me the phone couldn't be registered on their network.
Took my phone to a local VZW store.
Told the rep I bought a new phone and needed it attached to my account.
He validated my account details (he never asked for the IMEI of my new phone) & grabbed a new sim card, did his thing on the VZW tablet terminal and then popped the sim into my new phone.
At this point, the LTE data worked almost immediately, however the voice calling didn't work. Test calls just failed and quickly exited the phone app saying call failed/ended.
He said wait a couple minutes, sometimes it takes a bit, so we did. I think we also rebooted too. He was checking various things on my phone and the account.
He noticed that the VZW system said my phone couldn't be used on their network, but said there was something he could try...
He took the sim out of my phone and popped it into his already activated VZW phone. After a maybe 30 seconds, he made a test voice call, and it worked (my sim, his phone)
Then we swapped my newly activated sim back into my new phone and after about 30 seconds, I had both LTE data (as before) and now also had voice calling. A quick test call from my phone confirmed and I was good to go!
Obviously, YMMV, but it can be done, you just might need to find a VZW rep that is helpful and willing to go the extra mile to get the international version (SM-N975F/DS) activated onto the Verizon network.