Nexus 6p LTE broke after Rom update - General Questions and Answers

The basic problem is as follows:
I've got a Nexus 6p on which I dirty flashed an 8.1 update (27 Feb 2018) of ABC Rom over an earlier 8.1 version (01 Jan 2018) of ABC Rom. After that, the issues began. At boot, I'd be on 3g and if I toggled airplane mode off and then on, I could get LTE for about 10 seconds. However, it would then drop back to 3g. It's probably worth noting that my cellular provider is Verizon.
I tried everything that I could think of and/or learn via the google. Such as:
Wipe system, data, cache, and dalvic
Revert to stock
Install different/older radio images
Changed SIM (although still Verizon)
... nothing worked. I've read about people manually configuring their APNs. However, I've got a Verizon SIM, so that option does not exist... as far as I can tell.
I've identified a crappy work-around that allows me to get a stable LTE connection as follows:
Open the Phone's Testing Settings by dialing: *#*#4636#*#*
Tap "Phone Information"
Scroll down and set the "VoLTE Provisioned" toggle to the "on" position.
Then, toggle airplane mode on and off.
However, the reason I've described this as crappy is that doing this results in my phone being unable to make or receive calls. Whenever I try to make a call with VoLTE Provisioned, the call fails and reports "Server Error". Consequently, I generally just deal with the phone working in 3G. On the up side, this work-around does demonstrate that LTE is still possible... with the right configuration. Although, it would be nice if I could get both LTE and phone working vs just one or the other.
I came across this post suggesting that a possible solution is to boot the phone up with a non-Verizon SIM, power it off, and then boot it up again with the Verizon SIM. I'm not sure how this fixes the issue. However, before I go buy a $30 SIM in the hopes that it will fix my issue, I figured I'd make this post and see if anyone has any other ideas how I might correct this.
Any ideas are appreciated.
[email protected]

So after a few months of using 3g, I got my hands on brand new AT&T SIM card. (For what it's worth, it hadn't even been provisioned yet). I went ahead and boot the phone with this new sim card. (I also reset the new APN settings to the default, although it probably didn't do much). After powering the phone down and putting the Verizon Sim back in, I've got my LTE back and all is good.

Related

How to activate my Droid 2 Global?

I got my lovely droid 2 global (white) today, which is amazing. However, when I turned on the phone, it required me to activate. How can I activate it in Toronto, Canada without in US? Thanks.
Exit that wizard, switch to GSM/UMTS and you are ready to go (assuming you unlocked)
hi all,
i've been using my lovely Droid 2 Global outside US for quite a while (unlocked and using GSM network), and it worked all fine till today...
i tried to install fission today, and it didn't work for me (it just won't boot up), so i restore to 2.3.29, and finally managed to boot it up...
but after i power up, and enter PIN for my SIM, it requires me to Activate the phone...when i hit Activate, it immediately show "Phone Activation not supported on this network"...any suggestion on what i should do? i think i have the unlock code that i got from the buyer, but the phone doesn't even give me a chance to enter it!!!
i don't need to use Verizon network, i just want to use my D2G under GSM!! Please help!
i should have asked: why i need to re-activate again simply bcs i restore from a SBF??? I thought it shall stay as activated and unlocked once it was done...am i thinking wrongly?!
Don't freak up. Activation is only for CDMA radio. Every time you do factory restore (wipe data) CDMA programming gets erased too. GSM radio doesn't need activation. Simply ignore this, switch to GSM/UMTS mode and start using your phone.
If you have US account and you want to reactivate so you can use CDMA roaming feature, you need to do manual activation, but you may need Verizon's support to help you with some numbers you need to put up in programming.
BTW - the boot loop happened because you didn't wipe data after SBF. Fission (and any other non-stock ROM) will cause boot loop if you don't wipe data after SBF flash. (SBF flash process does not wipe data as part of the flashing).
GSM radio need to activate to use outside USA ! You need to contact with Verizon to get unlock code or use some unlock sim
tigerboy said:
GSM radio need to activate to use outside USA ! You need to contact with Verizon to get unlock code or use some unlock sim
Click to expand...
Click to collapse
You are mistaking unlocking with activation process. On GSM you activate the SIM card (Subscriber Identification Module), while on CDMA the "SIM" is integrated in the radio, hence you activate the radio.
For Droid 2 Global since it has essentially 2 radios - a GSM and a CDMA one, for GSM you need active SIM card to activate and for CDMA you need to make sure phone's MEID is active on your Verizon account then you program it (activte) either automatically while on Verizon network by dialling *228 or manually by calling Verizon support.
For the GSM radio in D2G, in order to use non-Verizon SIM in it, you need to unlock the phone first. Once unlocked, phone remains permanently unlocked and no SBF or wipe or anything will change this status.
Hey guys. I just bought an unlocked D2G on ebay so I thought I would share my experiences.
I got to the same screen where I was told "phone activation not supported on this network" and it was extremely frustrating. my only option was to hit ok and go back to the "touch the android" screen. I tried everything including the menu button. Nothing worked. This was with my SIM card inserted.
So I took out my SIM card and tried again. this time the menu button worked; it brought up the wireless options menu. I wanted to switch to "GSM only" as I had a feeling that would fix the problem. But I was told "no GSM card, must use CDMA mode". So, feeling stuck, I called Verizon, and after waiting on hold with the first CSR, and getting about 30 seconds into the phone call with the high up tech guy, I was in the middle of telling him about how in CDMA mode the wireless options menu would come up, but not with a SIM card inserted, the wireless options menu actually did come up. So I switched to "GSM only" and I was in!
Well, sorta. I had to get the phone linked with my google account via wifi, because the phone had no internet at all. A quick search of the internet revealed that this was a common problem - "I can talk on my D2G, but no data!" I called Rogers and sure enough, there were some settings I had to change to make this work.
Go into wireless options, then mobile network settings, then GSM/UMTS options (I assume you have a D2G because you want a droid you can put your SIM card in, right?) and then to Access Point Names. As this phone is unlocked, there are no APNs listed and your phone is neutered until one is added. I had no idea because my last phone was straight from Rogers and was of course hardwired to know this stuff.
Setting up the APN is really easy. just give it any name, list the APN as internet.com, MCC is 302, and MNC is 720. That's all. Back out. You will notice nothing is showing there. Don't do it again. It's there, but it's not showing up until you reboot. On my first reboot I had the 3G icon pop up in the notification bar and just about filled my pants. finally, the phone I paid $400 for was fully functional! No issues since then. Smooth as butter.
Thanks for the information and sharing leobg and seventieslord!
Gingerbread's rolling out, I'm planning to update my dad's D2G, but we're outside the US with an unlocked phone using GSM. I was worried after updating to Gingerbread, the phone would ask for a reactivation. This thread put my mind to rest
seventieslord said:
Hey guys. I just bought an unlocked D2G on ebay so I thought I would share my experiences.
I got to the same screen where I was told "phone activation not supported on this network" and it was extremely frustrating. my only option was to hit ok and go back to the "touch the android" screen. I tried everything including the menu button. Nothing worked. This was with my SIM card inserted.
So I took out my SIM card and tried again. this time the menu button worked; it brought up the wireless options menu. I wanted to switch to "GSM only" as I had a feeling that would fix the problem. But I was told "no GSM card, must use CDMA mode". So, feeling stuck, I called Verizon, and after waiting on hold with the first CSR, and getting about 30 seconds into the phone call with the high up tech guy, I was in the middle of telling him about how in CDMA mode the wireless options menu would come up, but not with a SIM card inserted, the wireless options menu actually did come up. So I switched to "GSM only" and I was in!
Well, sorta. I had to get the phone linked with my google account via wifi, because the phone had no internet at all. A quick search of the internet revealed that this was a common problem - "I can talk on my D2G, but no data!" I called Rogers and sure enough, there were some settings I had to change to make this work.
Go into wireless options, then mobile network settings, then GSM/UMTS options (I assume you have a D2G because you want a droid you can put your SIM card in, right?) and then to Access Point Names. As this phone is unlocked, there are no APNs listed and your phone is neutered until one is added. I had no idea because my last phone was straight from Rogers and was of course hardwired to know this stuff.
Setting up the APN is really easy. just give it any name, list the APN as internet.com, MCC is 302, and MNC is 720. That's all. Back out. You will notice nothing is showing there. Don't do it again. It's there, but it's not showing up until you reboot. On my first reboot I had the 3G icon pop up in the notification bar and just about filled my pants. finally, the phone I paid $400 for was fully functional! No issues since then. Smooth as butter.
Click to expand...
Click to collapse
God damned life saver ...... It is such a small change.... Add a APN.....
THANK YOU !

Help request: LTE Data works,"no service" otherwise. IMEI/number, but no texts/calls.

Help request: LTE Data works,"no service" otherwise. IMEI/number, but no texts/calls.
Software: Android 5.0.1 Skydragon M8 v2.0 Sense 7
Many people have posted issues with LTE where their cellular signal was fine for "2G" functions like calls and texts.
I'm having the opposite problem. After leaving airplane mode (landing at an airport today), I have a "No Service" message in the status bar drop down (notification tray), and the Settings>Network information page shows "Not Registered." However, I do have an IMEI (see details below). However, LTE data works perfectly fine.
I've obviously tried changing the settings in Settings>Mobile Data (preferred network to Global / LTE / LTE/legacy 3GPP mode) connection type global/auto/LTE/etc), to no avail. If LTE is connected it works flawlessly, but I cannot make calls or texts, and show not registered on the network. Data roaming is set to deny, but even allowing roaming does not change the situation.
Before this happened, I HAD gone through all the XTended Settings, and even 'looked' at (but did NOT change) some advanced settings pages, including the 'hidden' HTC network info page ( *#*#4636#*#* ). Again, however, I didn't change anything -- unless by accident?!
Does this sound familiar to anyone? Anyone know if I may have inadvertently changed something and can change it back (a setting that would persist in the hardware through NANDROID restores and factory resets...). Or, any other advice to restore the cellular service connection to normal?
I've tried a full NANDROID restore (multiple times) to a working copy, and a factory reset. I have limited access to a PC since I'm traveling, so re-flashing the VZW firmware or stock recovery or lollipop/verizon RUU would be challenging.
I did spend a good 45 minutes (at a library, my only PC access!) searching the forums and web, but to no avail.
Settings information:
OPperator Name: Verizon
Signal Strength -114 (I've had better but still have the same issues)
Mobile Network type: LTE
Service state: In service
IMS service state: Not Registered
Roaming: Not Roaming
Phone Identity page:
IMEI shows up (15-digit number...how can I verify I didn't mess this up?)
Phone Number is correct
IP Address: 100.66..... (looks good)
Any help is GREATLY appreciated!
Same here
I'm having the same issue. When i try to make a call my LTE bars drop to nothing and it says call failed no network available. Any ideas or help would be nice. I was using venom rom as well. I'm currently trying to flash the newest RRU to see if that resets things. I'm wondering if it somehow my sim card. I took it from my droid turbo. I've made sure to turn off advanced calling on my VZW account though.
Drhoot said:
I'm having the same issue. When i try to make a call my LTE bars drop to nothing and it says call failed no network available. Any ideas or help would be nice. I was using venom rom as well. I'm currently trying to flash the newest RRU to see if that resets things. I'm wondering if it somehow my sim card. I took it from my droid turbo. I've made sure to turn off advanced calling on my VZW account though.
Click to expand...
Click to collapse
I had this same issue, running from ruu then rooted. I didn't noticed until I started seeing voice mail notifications but never heard the phone ring. When I tried to dial out I got the immediate call lost message. I couldn't figure what was causing it so I just did a reset. I made sure not to restore any systems data from prior to the Lollipop upgrade. At this point everything is working, the only thing I haven't installed yet is the xposed framework and sense 6 toolbox.
mc_365 said:
I had this same issue, running from ruu then rooted. I didn't noticed until I started seeing voice mail notifications but never heard the phone ring. When I tried to dial out I got the immediate call lost message. I couldn't figure what was causing it so I just did a reset. I made sure not to restore any systems data from prior to the Lollipop upgrade. At this point everything is working, the only thing I haven't installed yet is the xposed framework and sense 6 toolbox.
Click to expand...
Click to collapse
What kind of reset did you do? I know my issue is slightly different, but I did a full RUU-flash yesterday (latest lollipop version) and still no luck. Unfortunately I'm out of the country now and access to a computer is limited, and I don't even have a SIM card yet to check if cellular service would work anyway.
I do intend to do a flash of the stock recovery and radios once I have the time and access, but that may be a while...
Still, I'll keep checking this thread to see if anyone posts any other options
lifebringer123 said:
What kind of reset did you do? I know my issue is slightly different, but I did a full RUU-flash yesterday (latest lollipop version) and still no luck. Unfortunately I'm out of the country now and access to a computer is limited, and I don't even have a SIM card yet to check if cellular service would work anyway.
I do intend to do a flash of the stock recovery and radios once I have the time and access, but that may be a while...
Still, I'll keep checking this thread to see if anyone posts any other options
Click to expand...
Click to collapse
Just go into settings and to Backup & Reset , this will return your phone to a fresh install and remove all non bundled apps.
Before doing the reset try going into Settings then Call then change Preferred Network to Global, or toggle from LTE then back to Global.

[Q] LG Nexus 5 fails to recognize celullar network

Hello,
I have a Nexus 5 phone that came with Kitkat a few months back. The phone worked without issues until I decided to update to Lollipop 5.0 (OTA update) at the end of November. Initially the phone started to have troubles to detect the network at certain times - typically "playing" with the settings "Preferred network type" by changing from 4G to 2G, restarting, letting the phone detect the network on 2G mode and change back to 3G or 4G would fix the problem. The issue became more and more frequent until a point where i can not change the "Preferred network type" from 4G to any other type (as if it is "glued" on that setting). At this point my phone does not recognize at all the cellular network but It does seem to recognize the SIM card since i need to enter the 4 digit code to unlock SIM and it displays the network name, just no service.
I've researched the internet and I've tried several things but nothing seems to fix it such as restart mobile, change to airplane mode and back, take out and re-insert SIM card, request new SIM card from operator. The APN settings seem to be OK.
I've noticed that a new 5.1 version just came out and although I was not fully familiar with the process i decided to give it a try (after reading several instructions) and update manually (using factory images posted) and see if that would fix it. The phone is now with version 5.1 and still can't recognize the cellular network - no service. Everything else works fine, including Wi-Fi.
Has anyone experienced such issue after OTA update? The only odd thing I can think of is that I did the initial OTA update to 5.0 in US while i was on travel from Europe, but I can't say if this would in some way contribute to the issue. The mobile is D821 model.
Since I was stuck and mobile is within warranty period, I have sent it to service repair. I would be interested to know ideas of what could be the issue cause.
Sorry for long message, any help would be very much appreciated.
Pedro

[Not-Fixed] How to install new Z3 D6603 LTE on AT&T network

[Not Fixed] see bottom of this post.
It is fairly easy to install a new D6603 to work completly on the AT&T network. It is not so easy to find the answer of how to do it in the threads and posts. I tried many suggestions and wasted a lot of time. Hopefully this will save you from that fate.
First you must know that you can't use the IMEI number of your new phone if you want it to work completly as it should. If you use the Z3 IMEI you will have trouble with data of various sorts and the phone will go off line when on LTE after 20 or 30 minutes and you will not receive calls or SMS messages. I do not know why but it has been suggested that the AT&T network does not recognise this phone so it causes trouble.
If you have an AT&T nano-sim from your old phone then just put it in the phone. (Cut downs work but can cause other problems some say.) When the SIM is inserted for the first time into a new phone there is a prompt that asks if you want to download the APN. Hit 'yes' and the phone downloads the APN itself.
If it does not ask then go to Settings>More>Mobile Networks>Prefered Network Type and be sure LTE (Preferred) is selected. Then connect your phone to the internet and then go to Settings>More>Internet Settings and select AT&T. You should be good to go.
If you need to get a nano-sim then go to the AT&T store or call and they will give you one or send you one for free. You will need to use the IMEI number from a LTE phone that is already on the AT&T system. You can use your old phone or borrow the number from someone. If the rep installs the sim in the Z3 with the 6603 IMEI don't worry. Just call support later and tell them you sent your new phone back and want to go back to your old IMEI or have a new IMEI (from an existing AT&T phone). They will enter it and off you go. The phone from the IMEI will show in the picture on your account page. Big deal!
Update: This worked for hours last night but this morning it is back to not receiving calls. Simply turning wifi off and it began to receive calls as GPRS was switched back on. My wifi was on which has been said to cause problems. I will test with wifi off and report back. Had "no service" instead of AT&T on upper left of lock screen. A full shut down for several minutes than re-boot solved that.
YMMV. I've been on ATT with a Z3 purchased from Sony store for several months and it was registered in an ATT store by scanning the IMEI off the box followed by updating Internet settings in Setup. ATT online shows unknown model but everything works including LTE and MMS. There is something else involved when problems like this occur probably some setting not getting reset. I registered the Z3 on a new line with a new Sim card because I wanted to take my time moving stuff off my old phone--this may have avoided the problems.
JudH said:
YMMV. I've been on ATT with a Z3 purchased from Sony store for several months and it was registered in an ATT store by scanning the IMEI off the box followed by updating Internet settings in Setup. ATT online shows unknown model but everything works including LTE and MMS. There is something else involved when problems like this occur probably some setting not getting reset. I registered the Z3 on a new line with a new Sim card because I wanted to take my time moving stuff off my old phone--this may have avoided the problems.
Click to expand...
Click to collapse
I've also had no problems with my Z3 on AT&T. Works great, receives sms/mms immediately, etc..
esheesle said:
I've also had no problems with my Z3 on AT&T. Works great, receives sms/mms immediately, etc..
Click to expand...
Click to collapse
AT&T's system sometimes takes a while to get updated with new IMEIs that trigger LTE provisioning for a users' account.
Once your account is provisioned for LTE you never have to worry about it again, but sometimes if you have a phone the system doesn't recognize, it is a pain to get AT&T to properly provision your account. Supposedly properly trained in-store reps can do it - the key being "properly trained" - Never try to do anything "unusual" by calling AT&T customer service, and NEVER use a franchise/kiosk in-person for service - make sure you're at a corporate-owned store! Even then, some stores might have incompetent staff. I've been lucky that all of my local corporate stores are pretty well staffed.
So you are saying that your Z3's with wifi and LTE on with AT&T are working as they should?
With LTE off my phone responds normally with wifi on. With LTE and wifi on it will not respond to calls after a 30 minute sleep. It does not show missed calls. Calls go straight to voice mail after 2 rings. Could you tell me what level your LTE dBm's are? Thanks!
I was told not to give them my imie# but, after recvng the minisim I had to call them in order to 'provision' it to work at all and they needed that #. I have never had any problems personally and am assuming this may be because you gave them the wrong #. Again I am only guessing. Oth, if I had had a different imie to give, I would have done so myself.
It is very strange and I am feeling it is more signal strength related than how you provision your phone. (Once it is provisioned correctly.) It seems that more people have less problems when they already have a nano-sim and just plunk it in the new phone. This might indicate that they already had a strong signal from the get go. My old HTC One + get's a better signal than the Sony in the same locations with the same (new) SIM. With the Devilcase bumper on it gets 5% less. My very limited tests yesterday seemed to indicate that it was signal strength related. I am not enough of a conspiracy theorist to imagine that AT&T would program their system to not function correctly with sims that are provisioned with these Sony phones which they are obviously ignoring for some reason. Or am I?
I had all kinds of problems with the Z3 on AT&T. The IMEI caused an issue since AT&T linked it to a flip phone and therefore couldn't provision LTE. I changed it to an old AT&T LTE device and then I was able to get LTE but was having the same issue with calls going directly to voicemail and texts showing up hours later in bunches. I found the solution was to switch off LTE in the quick settings menu. All calls and texts came through and on time while LTE was off. If I needed a data boost to stream, I turned it back on until I was finished streaming. This was while on KitKat. After upgrading to Lollipop, I was able to keep LTE turned on and calls and texts still arrived on time.
I use data rarely. Mostly wifi. If I don't leave LTE on, my phone reverts to wcdma preferred. And why can't LTE just work without me having to constantly turn it back on? What bugs me is having the APN settings greyed out. I want to be able to turn it off. If anything it seems the phone itself is preventing me from accessing the sim. It feels like I'm borrowing something which contains lots of MY private data. I know my phonebook is stored locally but I also noticed there is no option of specifying the sim or not. Anybody know how to switch APN on and off? In fact, overall even rooted, I still feel like I have almost no power over it. I can't even disable the cellular connection without going full on airplane mode and I do not trust that. I don't even fly so that needs work for sure. Dumb question but could I buy a working nanosim from say 7-eleven that my apn switch will work with?
"Anybody know how to switch APN on and off?"
On my Z3 on OTA stock Lollypop I have an icon in quick settings to turn LTE on and off. Drag two fingers down from the top of the screen. If no LTE icon then select the pencil icon at the top and select the LTE icon. There is also a mobile data icon switch there.
To turn off your radio completly you can get the Advanced Signal Status app and select additional info at the bottom and click phone information and turn off radio. Probably a number of ways to do it but that is one.
Sim contact storage was a way to move information from phone to phone. You can still do it but not really necessary with cloud backup and storage. Google does it for me without me having to do anything which I like. I still save contacts to the sim just because I can. Export and import in your contacts app menu.
johnboatcat said:
So you are saying that your Z3's with wifi and LTE on with AT&T are working as they should?
With LTE off my phone responds normally with wifi on. With LTE and wifi on it will not respond to calls after a 30 minute sleep. It does not show missed calls. Calls go straight to voice mail after 2 rings. Could you tell me what level your LTE dBm's are? Thanks!
Click to expand...
Click to collapse
Works fine here. I don't pay attention to the dBm estimates since these aren't measured with calibrated test equipment and vary widely. Those numbers are basically worthless.
The only valid comparison is data performance in a given environment (ideally a difficult weak-signal one) - and at my desk with very weak signal, every phone I've ever used performs similarly to the Z3.
"Those numbers are basically worthless."
True, but we have narrowed this down to the possibility that it might be signal related so it is worth a shot. If people whose phones are working fine would measure the LTE dBm on Advanced Signal Status at the location where their phone sits and works well the most we might possibly see some measure of difference in the phones that are not working. Most of the non-working phones seem to work sometimes so signal strength is the next best parameter to rule out. Thanks!
Here are the screen shots of my phone with LTE on, LTE and wi-fi and LTE off and wi-fi.
How do the working phones compare? Does your CDMA (voice) also go to 0% when LTE is on and GSM = n/a?
Thanks. I think adv sig nfo actually works. I'm amazed actually. I can't find the phone's native greyed out apn switch anyways which really makes no sense.

Verizon z4 on tmobile

Finally upgraded from my moto Z2 force. Wanted to keep all my motto mods so I purchased a Verizon unlocked moto Z4. Calling text data all work fine but I'm unable to get an option for voice over LTE and and when I make a phone call it drops to 3G. I visited a store and they replaced the SIM card. Unfortunately I'm still getting the same results, any hint tips clues on how to make this work ?
Stopdrpnro said:
Finally upgraded from my moto Z2 force. Wanted to keep all my motto mods so I purchased a Verizon unlocked moto Z4. Calling text data all work fine but I'm unable to get an option for voice over LTE and and when I make a phone call it drops to 3G. I visited a store and they replaced the SIM card. Unfortunately I'm still getting the same results, any hint tips clues on how to make this work ?
Click to expand...
Click to collapse
I have a Retail unlocked Z4 on verizon service, so a different situation than you. However, I have had some experience with my VoLTE disappearing from my Phone Settings>Network&Internet>Mobile Network menu.
To fix this:
1. I log into my verizon account from a pc,
2. go to Features/Add-Ons
3. Disable the Advanced Calling/VoLTE
4. Accept the terms&conditions about "changing your plan"
5. Confirm the change.
6. Reboot phone.
7. Go back into Features/Add-ons
8. Enable the Advanced Calling/VoLTE
9. Accept the terms&conditions about "changing your plan"
10. Confirm the change.
11. Reboot phone, and VoLTE should be showing back up on your phone settings (may have to give it an hour or two then try rebooting phone, just turn off and back on again).
The last time my VoLTE disappeared, I kept getting an error when trying to disable the Feature online in my account on my pc. I did the above steps disabling and then enabling a different free feature, and the end result was the same: VoLTE was back on my phone settings.
Maybe try doing something similar while viewing your TMobile acct on a computer.
Alternatively, if you have a family member or buddy that can let you pop in their VZW SIM card in your Z4, then go into their acct settings on a pc, do what I mention above, and then once you have VoLTE back on your phone settigs: Turn off phone and give them back their SIM Card, nothing would have really changed on their acct, and your phone should still have VoLTE in settings (until...I find the VoLTE disappears for me only after some of the Android security OTA updates, which fortunately/unfortunately are not really happening to our Z4s anymore).
Hope this helps.

Categories

Resources