I unlocked the bootloader of my Htc One m8 gsm a few weeks ago. I installed TWRP recovery and then cm12. I made a backup of my stock rom before doing a wipe. I then expeirenced that the mobile data was not working on the new rom. I also tried the GPE 5.1 lollipop rom but to no avail. There was a ' ! ' mark beside the service bar and no icon appeared in my status bar whenever I turned mobile data on. Today I restored my phone back to the stock (sense) rom and still mobile data is not workinng.
I can not understand the problem. It just says 'disconnected because service is unavailable'. I have been able to recieve text messages/calls the whole time, just the mobile data does not work.
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OK I have X1021 single sim variant.
Bootloader unlocked. TWRP and SU installed. All OK.
Flash CM11 and data didnt work, so flashed SLIM instead. Data still doesnt work.
Restored to factory default and now I have no connection to mobile network at all. Radio is switched off. Cannot search for networks at all.
Currently back running CM11 with Minor pack GAPPS. I really need my phone to work with at least SMS and voice calls. If anyone can help it would be highly appreciated!!!
Hello,
When I go to SIM Status in the settings, it says "Unknown" under "Network". I can't make calls nor text. However, 4g LTE data is working.
I live in the US and took a trip to Europe. This happened upon returning. I did not do anything unusual with my phone while abroad. While abroad, my phone connected to local networks without problem and I was able to send/receive text messages and make calls. When I got back to the US, it just says "no service" under the status.
Info:
* I am using the latest nightly of CM (which I flashed AFTER encountering this problem). No change. Before that I was using a nightly from a month or so ago without any issues
* I have checked the APN configuration and it looks correct
* My IMEI is intact and correct
* My baseband version is I545VRUAMDK
* I called Verizon and they said something about my phone not being able to enter the "Active" state. They are unsure as to whether or not it is a software problem or a network problem
Any ideas of how to fix this?
Solved
Just for the record, I fixed this problem by following the directions here.
Just in case the URL eventually fails, I used ODIN to restore back to stock, which did not initially fix the problem. From stock, I used the factory reset option from recovery mode. This fixed the problem. I still do not know what caused it.
One more problem not related to the above. Once I restored to stock and did a factory reset, I attempted to use the built-in updater to get to the latest version (currently Lollipop). The update failed with a 402 error. I was able to update using the Verizon Upgrade Assistant from my desktop computer. After upgrading this way, I ran into yet another problem with an error message that kept coming up, saying "com.android.phone has stopped working". I booted back into recovery and once again did a factory reset of the phone which fixed the problem. Everything is working as intended now.
Info: HTC One M9 Sprint Variant
When I had installed a custom ROM on my phone prior to bringing the phone to sprint to activate it, the Sprint tech inserted a SIM card and did some things on the phone, and the phone had a 4G connection icon, but couldn't place any calls. Nor could the Settings>Activate This Device be used (loading forever), and Settings>Update PRL & Update Profile also would give some network error.
However when I wiped everything back to factory defaults, the phone (despite being being wiped) was able to pull that network info from somewhere and easily connect, at which point the updates could be downloaded.
So questions:
If I wipe /data/ and /system/ to install a new ROM, will I lose this network connection info?
Where did the phone pull that info from after I wiped/factory reset it?
I have a Jiayu S2 double-SIM phone, running the most up to date official ROM (4.4.2).
This ROM had a couple of bugs (no GPS and no notifications to external devices such as smartwatches), so I wanted to check other available ROMs. Using the Flash Tool I have tried a couple of the ROMs in the needrom site (https://www.needrom.com/category/jiayu/s2-jiayu/). In particular, a couple of versions of the official ROM, another ROM known as Salamander, and an unofficial port of Cyanogenmod 12 (in which the camera was not working).
The issue is that, for some reason, at some point my phone has stopped getting phone signal. The SIMs ask for the PIN on startup, but there is no signal. I have reverted to the original ROM; plus done a factory reset, and I could still not get signal.
The APNs for both SIMs are fine. Then I have realised that the IMEI was empty. Luckily I had it written down, so I have installed Xposed and the Device IMEI Changer, with which I have been able to restore the IMEI. Now I can see the IMEI on the Settings - IMEI information, as well as with *#06#.
But still, now with the original ROM, and with the IMEI restored, I still cannot get phone signal. I have tried setting the phone to flight mode, restarting, selecting manually the network... When trying to manually select the network I can see several networks, but the phone will simply not connect to the one it should.
Any idea on why could it be that I cannot get phone signal? Thanks.
After trying everything, including restoring the IMEI with Xposed, I have finally managed to restore cell service by restoring the IMEI with this tool: https://play.google.com/store/apps/details?id=com.cryptotel.chamelephon
Hey guys,
since one week my phone doesn't connect to my mobile provider anymore, it says emergency calls all the time. When I restart my phone it requires the pin to unlock it - so my phone detects the SIM also the strength of the signal changes and I can also search for other providers but I can't connect to any of them. I've checked the SIM Card in another phone without problems. I did a reset of the connection settings but without any success.
It's making me crazy because im travelling right now and my mobile is pretty useless also I don't have a PC with me to reflash the ROM...
TWRP is flashed and the phone runs with Fulmics Rom 3.5
edit: after updating to Fulmics Rom 4.0 the mobile connection worked for a few hours but now it's the same problem again. I did a clean flash with a factory reset...
The Problem is resolved for OP. However, we are keeping it open just in case someone else runs into the same problem and wishes to discuss their issue.