Hi everyone. I decided to root my H918 from 10t by using lafsploit. At this time, my calls, LTE, and SMS were all working perfectly. After downgrading to 10p and unlocking bootloader, the device had difficulty staying connected to a single tower. it kept dropping signal often and was not able to make outgoing calls or stay connected to LTE for too long. After this I flashed LineageOS 15.1, not thinking much about it. On LineageOS, every time an outgoing call was made, it would drop the signal for about a minute. If no calls are made, LTE and SMS sort of work. I flashed 10u stock after that with Magisk and the phone has difficulty connecting to LTE or making calls/sending SMS. I have tried the following:
- Reboot
- Clean flash
- Format where you type "yes"
- APN settings
- Network mode change
- Airplane mode on/off
Somehow after a reboot (on Stock 10u zip) I'm able to make 1 or 2 calls and then it stops working. I called the carrier and they said there are no outages in my area.
I put my SIM in another TMO phone and it worked perfectly. I put their TMO sim in my phone and it had difficulties making calls. So the possibility of it being a sim issue is ruled out most probably. I have been recommended by a few people to try and flash an h918 modem but 1. Not sure if it is safe and 2. Not sure where to source it from. I have no other ideas and this is my primary phone so I'm having difficulties without a usable phone. Any suggestions would be hugely appreciated. Thank you.
Update: Tried flashing to 10p kdz from download mode but didnt solve anything.
Is the wifi also on?
I'm having the same problem, but was running on 10j. I went back to stock and upgraded to 10u to see if it fixes the signal problems I have with this phone. Both Cell signal and GPS on this lg v20 are horrible. On using the h918 on at&t. If not, i will either need to go back to my moto x pure or maybe buy the international note 9 with the unlocked bootloader.
androiddiego said:
Is the wifi also on?
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The Wifi is on, but I also tried with the wifi off as well as turning off wifi calling, Volte, etc.
Alibaba0101 said:
I'm having the same problem, but was running on 10j. I went back to stock and upgraded to 10u to see if it fixes the signal problems I have with this phone. Both Cell signal and GPS on this lg v20 are horrible. On using the h918 on at&t. If not, i will either need to go back to my moto x pure or maybe buy the international note 9 with the unlocked bootloader.
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I tried the same. Just flashed a 10p kdz to see if that would fix it, but no luck. Same issue happening on complete stock OS..
I replaced my sim yesterday, but that didn't make any difference. Before that i replaced the plastic bits on the top and bottom of the phone where the antennae contacts with.
I went back to 10j yesterday which was still arb0 and now upgraded to 10u which is arb1. I'll miss lineage, but i was just having too many problems with it. Not sure what at&t has on band 30, that's the only band this phone is missing. I regularly was losing signal while just driving on the freeway.
Hello. I have the same issue on LineageOS. Been trying to fix it but no hope. But I did find a temporary solution. Let me describe the problem. I'm having a LTE sim that works just fine, then it just stop working. The problem is when you enter an arena without LTE or the LTE is too weak at that point then your cell signal is laggy and lost completely. But you can switch the Preffered Network Type in the Settings to WCDMA/GSM/CDMA and your cell signal is back. That's my solution for now. Hope It helps.
With a custom rom, you can't have wifi on with data on. Simply turning wifi off doesn't fix the problem. You would need to reboot. This has been a problem from the beginning. It works with a totally stock phone, but beyond that, no.
Here is the only way to keep data calls working properly: If you need wifi, turn on airplane mode, then turn on wifi. When you are done, turn off wifi, then turn off airplane mode to bring data back.
Not sure the signal is any better with the new firmware on 10u, but at least my location services is behaving better and the camera actually works in stock. I did a side by side comparison of the gps signal with my moto x pure. Side by side the moto x pure got to an accuracy of 10ft with 21 satellites in view. The lg v20 locked on much slower to 8 satellites with an accuracy of 50 ft.
For comparison -
satellite 14 signal strength
moto x pure 34
lg v20 23
the cell signal may be better with fewer drops, but in some places without lte the speed and throughput is miserable.
Related
Hi, I have D801,
I recently started to have this wierd problem, where I would lose all my signals completely, and comes back on, just without an LTE (regular 4G).
after this, if i go in to network settings, it is defaulted to WCDMA only or WCDMA preferred, instead of the ones with LTE in it.
no matter how many times I change this, it keeps going back.
I literally live right next to the tower.
I did not have this problem a day ago, I don't know what is causing this problem
i have flashed
http://forum.xda-developers.com/showthread.php?p=49449195
this on my D801, and this is the only thing I did before having any issues.
or maybe it's something else.
APN setting looks normal etc.
can anyone tell me what to do ?
I tried going back to completely stock, and the problem is still there.
I used this method.
http://forum.xda-developers.com/showthread.php?t=2477595
is there anything in this procedure that doesn't get restored to stock?
HELP!
I was at a location where the network reception was bad and I lost signal. My phone has not been having network signal since then. Signal strength 0.
When I first started using CM13 my signal went to roaming when I know I should have service. I have data roaming off and I've checked to make sure I'm not getting charged for roaming and I'm not. My phone works as it should and I can do everything I need still so I was hoping it would be fixed in one of the new updates. I am on the newest nightly build as of this morning and the R above my signal is still there, just wondering if anyone else is having this problem or know the cause?
I have the same issue on my Nexus 6
Same issue here. Nexus 6 Verizon, just switched to CM13 and I'm stuck on roaming - so far I've tried airplane mode for a minute or two, turning the data off and on, turning the phone off and on, and chatting with Verizon support in case they could do anything remotely. The one thing I haven't done though is try putting another sim card into my phone to see if I could divine any information that way.
Any help would be appreciated.
So after trying just about everything I decided to cave in and jump back to CM12. It was there that I noticed a key difference:
CM12's settings -> mobile network settings, has the following sub-options:
Data Roaming on/off
Preferred Network Type
Enhanced 4G LTE Mode on/off
System select
Access Point Names
CM13 (nightly #2) only has:
Data Roaming
Preferred Network Type
System Select
...while in all honesty I don't know what it all means except to say that it appears to be missing some features of the CM12 nightly I'm using on my Nexus 6 on Verizon. I guess I'll try back in a week or three to see if everything is working fine.
For whatever reason I had LTE pop up for like 2 seconds but went back to R and has stayed since..
I had my phone running PureNexus(7.1.2?) on Cricket with no issues, a couple days ago at the same time as switching to Sprint, I decided to update my ROM, went with a 8.1 ROM. When I did this, I had issues getting any sort of signal to work right, so I figured it was something with the custom ROM, grabbed the latest stock and reflashed. I then went through the same thing many others have here, but when I go back to the custom 8.1 ROM, I do not get LTE to connect, just 3G. Even erasing modemst1 and 2, it does not connect to LTE. So, ignoring that, I still backed up the EFS and restored it over the stock ROM. Doing this, I'm able to get 3G and voice to connect, but when I go into the phone menu(*#*#4636*#*#) and turn the radio off then back on, eventually it will connect to LTE. But in doing so, it puts the phone in 'emergency calls only' for voice. Currently it shows
Voice Service: In Service
Data Service: Connected
Voice Network Type: 1xRTT
Data Network Type: eHRPD
And if I go into the menu and toggle the Mobile Radio Power, it will change to:
Voice Service: Emergency Calls Only
Data Service: Connected
Voice Network Type: Unknown
Data Network Type: LTE
Once it goes to LTE, it does not go back to voice/3G even on reboot unless I erase the modem or restore an EFS backup. I've been able to replicate this 3 times now in 3 different 7.1.2 ROMs, anything 8.1 I've only been able to get 3G working. In 7.1.2 I am able to run the update device configuration, and update PRL. Both work successfully, but it still does the same thing. At this point, I know that the hardware works, as both do work fine, just not at the same time. LTE and voice does still work fine on Cricket, I put in another active SIM and both work as expected. Anyone know what else I could try?
Sorry if this is rambling, I actually had a much more detailed post then somehow refreshed my screen and lost it all
I'm essentially having the same issue with my Moto g5 plus on Verizon. Read my post!
I am having a similar issue on Sprint as well. For a little while I couldn't get 8.1 ROMs to connect to data at all, after serial flashing a bunch of them I ended up with data again accross all ROMs but now I only have LTE, it does not switch to 3 g ever, only 1x when making phone calls. I wish I knew which ROMs I flashed to get to this point but I can't remember anymore. Good luck.
emraith said:
I had my phone running PureNexus(7.1.2?) on Cricket with no issues, a couple days ago at the same time as switching to Sprint, I decided to update my ROM, went with a 8.1 ROM. When I did this, I had issues getting any sort of signal to work right, so I figured it was something with the custom ROM, grabbed the latest stock and reflashed. I then went through the same thing many others have here, but when I go back to the custom 8.1 ROM, I do not get LTE to connect, just 3G. Even erasing modemst1 and 2, it does not connect to LTE. So, ignoring that, I still backed up the EFS and restored it over the stock ROM. Doing this, I'm able to get 3G and voice to connect, but when I go into the phone menu(*#*#4636*#*#) and turn the radio off then back on, eventually it will connect to LTE. But in doing so, it puts the phone in 'emergency calls only' for voice. Currently it shows
Voice Service: In Service
Data Service: Connected
Voice Network Type: 1xRTT
Data Network Type: eHRPD
And if I go into the menu and toggle the Mobile Radio Power, it will change to:
Voice Service: Emergency Calls Only
Data Service: Connected
Voice Network Type: Unknown
Data Network Type: LTE
Once it goes to LTE, it does not go back to voice/3G even on reboot unless I erase the modem or restore an EFS backup. I've been able to replicate this 3 times now in 3 different 7.1.2 ROMs, anything 8.1 I've only been able to get 3G working. In 7.1.2 I am able to run the update device configuration, and update PRL. Both work successfully, but it still does the same thing. At this point, I know that the hardware works, as both do work fine, just not at the same time. LTE and voice does still work fine on Cricket, I put in another active SIM and both work as expected. Anyone know what else I could try?
Sorry if this is rambling, I actually had a much more detailed post then somehow refreshed my screen and lost it all
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Your problem is really simular to mine, but I have an axon 7 and the service is Total wireless (verizon). I can get data and calls are emergency only. Its very odd, the other odd thing is I have 2 axon 7 (got a replacement). The one with the problem has everything working and the kicker is I restored this replacement to match the working one. So why It cant connect is really odd.
madhits45 said:
Your problem is really simular to mine, but I have an axon 7 and the service is Total wireless (verizon). I can get data and calls are emergency only. Its very odd, the other odd thing is I have 2 axon 7 (got a replacement). The one with the problem has everything working and the kicker is I restored this replacement to match the working one. So why It cant connect is really odd.
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How is this similar? You are trying to use an Axon 7 on Verizon's network... How do you expect that to work? The Axon 7 doesn't have a CDMA radio.
acejavelin said:
How is this similar? You are trying to use an Axon 7 on Verizon's network... How do you expect that to work? The Axon 7 doesn't have a CDMA radio.
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Yes it does have CDMA. Its just not officially supported by verizon. I found out that my modem partition I believe EFS was messed up and that contributed to the emergency calls only issue. I never got it fixed even through multiple re-flashes so I simply sent it back to ZTE.
madhits45 said:
Yes it does have CDMA. Its just not officially supported by verizon. I found out that my modem partition I believe EFS was messed up and that contributed to the emergency calls only issue. I never got it fixed even through multiple re-flashes so I simply sent it back to ZTE.
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I stand corrected... I assume you have seen this, especially post #3?
acejavelin said:
I stand corrected... I assume you have seen this, especially post #3?
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I have read that thanks for pointing it out. I actually could offer a correction to what he says because you can get VoLTE on the axon7 with verizon but its tricky. I had to activate the phone on an HD voice 1.0 phone iphone 6 or newer and prob other models. I have total wireless (verizon Mvno) once I do that I can swap the sim and get VoLTE on the axon7 through turning it on in test mode. Ive had volte working for a while now. I believe verizon just thinks Im on the iphone6. and I dont know what would happen if I took the iphone 6 and tried to use it on another verizon account as my service is prob tied to its IMEI.
Installed the Beta Oreo (stock and AOSP) on my Axon 7. After erasing and flashing with the U variant radios (my device is US) the phone initially receives full cell and data service. However, when entering a highly intermittent area like tunneled Public Transit, for some reason the radios stop working....and never come back. I simply would not receive signal any longer. Searching for data networks manually would find towers, but connecting to them does not restore service. Reflashing the bootloader and U radios does not regain signal. I would need to reinstall the entire ROM including bootloader and radio. Again, I would receive service fine until I reach an area with very low levels of service. This happened on the stock B12 ROM and the AOSP ROM. It's something to do with this Beta but I'm not sure what exactly. I'm on T-Mobile in the US.
Anyone else had the same issue?
I'm on AT&T and never had this issue.
Did you try to toggle airplane mode?
Did you check the APN settings? Maybe they changed?
Did you try setting the network mode (GSM/CDMA/LTE etc...)?
mozillameister said:
Installed the Beta Oreo (stock and AOSP) on my Axon 7. After erasing and flashing with the U variant radios (my device is US) the phone initially receives full cell and data service. However, when entering a highly intermittent area like tunneled Public Transit, for some reason the radios stop working....and never come back. I simply would not receive signal any longer. Searching for data networks manually would find towers, but connecting to them does not restore service. Reflashing the bootloader and U radios does not regain signal. I would need to reinstall the entire ROM including bootloader and radio. Again, I would receive service fine until I reach an area with very low levels of service. This happened on the stock B12 ROM and the AOSP ROM. It's something to do with this Beta but I'm not sure what exactly. I'm on T-Mobile in the US.
Anyone else had the same issue?
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Click to collapse
Yes, I saw this with B12 on my A2017U on TMO in low LTE signal areas. Trying to fix this LTE performance issue, I ended up getting stuck in DFU mode.
3 weeks ago, I actually had to send my A2017U back to ZTE for warranty replacement. New unit does not exhibit this issue. I think I may have had a bad radio in my phone.
Pretty self-explanatory from the title, unlocked 6T with Oxygen 9.0 .5, constantly losing data signal, sometimes reconnecting in 5 or 10 seconds, sometimes taking longer or one time even requiring a reboot. Anybody noticed this, known issue?
Edit: on T-Mobile with T-Mobile SIM, APN looks all good, it auto-loads when you put the Sim in.
I've only seen my OP6T (unlocked) lose TMo signal once. It was when I was using the Switch app to migrate apps/data from my Pixel 2 XL. I had to reboot in order to get it to reconnect. But that was on 9.0.4. No issues since that one time and no issues on 9.0.5.
Jaxidian said:
I've only seen my OP6T (unlocked) lose TMo signal once. It was when I was using the Switch app to migrate apps/data from my Pixel 2 XL. I had to reboot in order to get it to reconnect. But that was on 9.0.4. No issues since that one time and no issues on 9.0.5.
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Pretty much what this guy said. I'm also on T-Mobile. Used phone out and about today after update works fine.
Check your APNs and worse can just network reset.
Thanks to both of you, I did the network reset to default so I will see if that helps. Thanks again. The APN seems to Auto load when I pop in my T-Mobile SIM, so it's kind of greyed out but the settings look fine from what I remember of the T-Mobile APN.
Update: tried multiple Network resets, the issue persists. I believe my phone is going back, it's happening every 5 to 10 minutes when I'm using the phone.
I'm still getting lots of signal drops even though I've tried so many different things. The LTE Discovery app seems to be showing that I'm usually on t-mobile LTE band 4, but when the connection drops out and reconnects after 5 seconds or so, then I'm on band 2. So it's been suggested that it might be network congestion with all the new subscribers. But this doesn't seem to happen on my T-Mobile branded V30, or at least I haven't noticed it or it doesn't show in the status bar icon. So, I still don't know whether to keep the phone but chances are I guess I will.
Edit: this post failed because of a signal drop and I had to wait 15 seconds before I could get it to go through.