I bought this phone for my wife 2 mounths ago, phone was locked.
I tried to unlock with GCPro but no luck. Then I used this service "INSTANT REMOTE UNLOCK CODE AT&T" on Ebay, It worked, but after a couple of days I noticed a problem. I was not given an unlock code, so most likely he erased and write cert in my phone. I just saw the phone reboot 3 times and then a message appeared on the screen "Network Unlock Successful". All took about 10 minutes.
Now when the phone is in one place - the connection to the network is stable, but if you go to another place (as I understand it when one cell tower is switched to another) - the network antenna disappears, the signal level is -101db, outgoing\incoming calls are not possible, no data. Helps only airplane mod on\off or reboot. I tried different firmware, set different network modes, etc - nothing helps.
So now I need backup a QCN from working phone ( preferably from unlocked AT&T G950U ). For now this is the only temporary way to get phone back to normal state.
So, I need help with a QCN ....
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here is what happened...
got my xda 2 a few weeks which was supposedly "unlocked" and installed a sim card from my local provider and i had mobile inernet for about a week and then a few days later it just stopped. i completely lost the signal and up in the connectivity section it just says "no service". i have tried a hard reset and that didnt help. i still dont know when the heck happned or what is wrong but now things have gotten even weirder. when i toggle between flight mode on and off it prompts me saying "sim card blocked. please enter PUK" does this mean my xda 2 is locked? is it possible for a device to be unlocked and then locked all over again for some reason?
i tried using the unlocking tool from this site but the one that runs off you desktop pc tells me the phone is already unlocked and the one you run off your pocket pc tells me everything is fixed but i still get prompted for the PUK?
your problem is that your SIM card is locked, not your device. This mostly happens when you try to enter the PIN code 3 times without success. The only way out is to enter the PUK code, so you can change the SIM password.
In Europe, this code is mostly given to you at signup time. Here, in the US, they make you call the telcom operator and dig it out of them, if you get a competent person on the other end of the phone line.
So, my bet is that you entered the wrong pin code for your phone -- and maybe you did this without even knowing you did it.
sigh...to tell you the truth i was hoping it was a locked xda 2...maybe that would of explained why im not getting a signal ...
You are not getting a signal because the puk is now required to access the sim/service provider. You should be able to get the puk by calling your provider or online through your providers internet site, you should then have a working phone again. To prove this to yourself just place another sim in the phone.
I recently flashed NAZtech Desire ROM and now the phone does not connect to a network. I just get the "emergency calls only" message, but that (999) doesn't work either.
The APN settings are in and selected, but when I try to select a network I get a message that says this SIM cannot connect to this network, even trying to select automatically gives the same result.
I've tried multiple ROMs and multiple SIMs and yes, I have tried doing a Nandroid restore yet still can't connect to a network.
I've tried flashing a new Radio image and reflashing cyanogen's ROM but that still doesn't work.
N.B. This did not happen imediately after flash, it happened over night as I slept. I woke up one morning and it did not connect, I tried moving to multiple different basestations in different areas with no result.
Nandroid?
The good news is that your radio isn't fully dead, bricking your phone.
This is probably not very helpful (though I don’t think anyone is going to be able to be really), but this sounds like what happens when you IMEI is blocked or invalid. The networks won’t let it connect.
Its happened to me on a pervious phone. Unlocking it caused the IMEI to be set to all 0s. Had reset it before it would connect.
Would also fit as you say it didn’t happen straight after the flash. Maybe it was unconnected?
Any chance this has happened? Ring your network see if they can tell you if its blocked (maybe a mistake when someone reported a missing phone...?) Sorry as I say probably not much help.
BigDamHero said:
This is probably not very helpful (though I don’t think anyone is going to be able to be really), but this sounds like what happens when you IMEI is blocked or invalid. The networks won’t let it connect.
Its happened to me on a pervious phone. Unlocking it caused the IMEI to be set to all 0s. Had reset it before it would connect.
Would also fit as you say it didn’t happen straight after the flash. Maybe it was unconnected?
Any chance this has happened? Ring your network see if they can tell you if its blocked (maybe a mistake when someone reported a missing phone...?) Sorry as I say probably not much help.
Click to expand...
Click to collapse
What would I see if it was blocked? if I enter *#06# It just shows my IMEI number. My phone isn't tied to a contract and I've tried different SIMs so how do I check/or get it unlocked.
Did you try another active sim card, or your sim in another phone? I had this same problem and it was just a dead sim card, went to Tmo and they gave me a new sim card for free, popped it in and it connected in a couple seconds.
ikon8 said:
Did you try another active sim card, or your sim in another phone? I had this same problem and it was just a dead sim card, went to Tmo and they gave me a new sim card for free, popped it in and it connected in a couple seconds.
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Click to collapse
I'm currently using the Three UK SIM I usually use for my N1 in my old Samsung Omnia, and I've tried another o2 (untied)* contract SIM and another active SIM.
*I know it's unlocked because it was bought for the Xperia X1 and used in two other phones afterwards (within the contract duration which is due to end later this year) - G1 and iPhone 3GS
Antiskunk said:
What would I see if it was blocked? if I enter *#06# It just shows my IMEI number. My phone isn't tied to a contract and I've tried different SIMs so how do I check/or get it unlocked.
Click to expand...
Click to collapse
You would see what you are seeing (you can see the networks but not connect to them). My MUCH older phone that I referred to did much as yours is doing. There was only the option to make emergency calls.
Its possible to report a phone stolen (by its IMEI number) and ALL the networks will block that IMEI number from connecting. Its designed to combat phone theft. Its the same reason that it is illegal to change a phone's IMEI number.
I doubt this is the case (unless you can think of a reason why it might have happened). But maybe ring your network just in case and ask them to check if your IMEI is blocked.
For the past five days my N910F has been unable to register on a network. This problem first arose while I was using the Kyubi Note 5 ported ROM. Initially I was able to manually enter the APN details and use mobile data without issue, but had to keep manually re-entering the APN info as the phone would "refresh SIM data" every ten minutes. I could search for network operators and could see every available network in my country except my own, I was advised to attempt to connect to them all by my carrier's support but all would show as registered for a split second before dropping straight away.
The following day I flashed stock Marshmallow that I downloaded from Sammobile N910FXXU1DPD3 through Odin which factory reset the device, I've since rooted and put TWRP on it. Now when I search for network operators I can see my network along with the rest of them, but same thing happens and it can't properly connect.
The SIM card works in an old Galaxy S 3 and I've had my carrier send me a new SIM which arrived yesterday and after activating it, is doing the same thing.
When I bought the phone, I bought it second hand and it was carrier locked and the carrier would not unlock it. As a workaround, I went to a dodgy GSM shop who did something which essentially changed the IMEI of the device so that it would work, so my phone's IMEI when I dial #*06# and the one under the battery/on the box do not match. I only add this because I've read online that it could be an IMEI issue? However, this different IMEI hasn't caused me any problems for the last year and a half of owning the phone (apart from the fingerprint scanner not working).
Does anyone have any suggestion for the next step? Is it worth sending to Samsung for a warranty repair? Should I try a different modem?
Basically you have knowlingy changed the IMEI to get around a carrier block, which is illegal. In doing so, and also by rooting the device you have voided any warranty left on the phone.
Congratulations, you now have one of the most expensive paperweights you will ever own.
Sent from my SM-N910F using XDA-Developers mobile app
Mod edit: Thread closed.
Changing the IMEI is illegal in most countries. Therefore the discussion thereof is prohibited on XDA.
Hey guys, I'm having an issue that I can't seem to resolve on my own. I recently broke the screen on my Note 5 so I decided to use my old Note 4 until the Note 8 comes out. Today I took out the phone, placed my simcard into it and started it up. I thought everything was fine until I tried making a call where it just gives me a pop up notification that I'm not registered on the network.
The phone isn't locked, bought it new unlocked. No custom roms (ever), IMEI is correct (naturally). So far I've reset the phone to factory settings to see if that would help to no avail.
If manually choose a carrier manually (both searching and choosing one takes longer than usual) I get a new message "No Service Selected Network (Telia N) not available".
The phone worked prior to me putting it away, my sim card works in other phones. Any suggestions or am I up sh**s creek without a paddle?
take out the simcard and try an emergency call (in my country it's a crime to playing with it. But without the card nobody can catch you.)
if the message appears again = it seems HW related problem
if the emergency call is working = it seems your phone restricted by the carrier and you need to ask the customer service why. Maybe a mistake
Thanks, it appears to work without sim card dialling 112. I'll email and call my service provider tomorrow.
I have a Nokia 6 on the T-Mobile network, I am only using one SIM on this device. Recently whenever I use a short code to check my balance, data usage, etc. I get a "connection error or invalid MMI code" error. When I first got the Nokia 6 it worked fine then it starting giving this error.
I called TMo but they can't figure it out, I rebooted, manually and automatically re-selected the service provider, booted in safe mode. T-Mobile reconnected my device to the network themselves multiple times too, same error.
Yesterday, I found an old Alcatel Android phone which is a single SIM phone, I put my SIM in there and the short codes worked fine. I put the SIM back into the Nokia 6, I got the error all over again.
Does anyone know a fix for this, I am only using only SIM card so the articles and YouTube videos I found were not working as they concerned a phone with 2 SIMs.
Thanks all.
Fixed---sort of
andrm said:
I have a Nokia 6 on the T-Mobile network, I am only using one SIM on this device. Recently whenever I use a short code to check my balance, data usage, etc. I get a "connection error or invalid MMI code" error. When I first got the Nokia 6 it worked fine then it starting giving this error.
I called TMo but they can't figure it out, I rebooted, manually and automatically re-selected the service provider, booted in safe mode. T-Mobile reconnected my device to the network themselves multiple times too, same error.
Yesterday, I found an old Alcatel Android phone which is a single SIM phone, I put my SIM in there and the short codes worked fine. I put the SIM back into the Nokia 6, I got the error all over again.
Does anyone know a fix for this, I am only using only SIM card so the articles and YouTube videos I found were not working as they concerned a phone with 2 SIMs.
Thanks all.
Click to expand...
Click to collapse
Well, someone helped me resolve this (no not Tmo, but it wasn't a Tmo issue). Seems the Nokia 6 no longer switches to HSPA+ mode in order to process the short code (USSD), the workaround is to temporarily toggle the Nokia 6 to 3G, once this is done, the short codes work. I can then place it back onto 4G (LTE).
It used to work, so I am wondering if a recent Nokia update changed this. Not a big deal, I just have to toggle to 3G use the short code, then go back to 4G, a few seconds.
This person stated he had an issue with his LG, and found a setting to allow USSD over IMS in the hidden menu to resolve this so he doesn't have to toggle back and forth. I did not see this option in the hidden menu, so the 6 may not support it.