My i9505 reports "No Service" when in service mode. Any suggestions on how to troubleshoot?
I've got 4 i9505's side by side on my desk. I've used service mode to lock them all to LTE Band 3. I had to flash three of them to an older modem to get access to the options in the service menu as it appears Samsung have purposely blocked this in newer firmwares. They all showed nice coverage. Then, all of a sudden one of them stops picking up LTE. When I go into service mode it says "No Service". If I allow it to automatically select the technology, it has no issue scanning and attaching to WCDMA and GSM but it'll never go to LTE. That model was rooted at one point. The other devices are still attached to the same cell and show great coverage.
I've tried the newest German firmware, but then couldn't get into the service mode options to lock it to LTE. Loaded the oldest and it still has the same issue.
Next of my list is trying UK - BTU UAMDM firmware from Samware as I've heard it works with LTE but then so did the original firmware :s
I have modded my phone a lot and I think one of my mods may have messed up the search for my carrier after I reboot.
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The problem:
After I reboot my phone it tells me that I have no carrier selected in the system tray. I click on that notification in the system tray. It takes me to the Network operators screen under settings. Then after about a minute it shows all the operators in the area and I need to select mine.
Possible reason:
When I first got my nexus 4 I thought I could activate LTE. I did activate it but it didnt connect to LTE. After thinking that I didn't activate it properly I tried a series of hacks to try and get lte to work. I tried different radios that supported lte. I tried using *#*#info#*#* from the dialer and changed preferred network type to lte only. Since then I have switched it to GSM auto (prl) since that is the only one my carrier will support.
I think in one of the hacks that I did it screwed up the ability to remember the carrier that I had before the last reboot. I have tried different roms with no luck. Currently I use crDroid. I have updated to the newest version which is currently build16. Is there any thoughts on what I can do to fix this.
I don't reboot my phone often but it's annoying when I reboot to have to fiddle with the phone for over a minute just to get a signal. Even if there was some way to search for carrier quicker I would be happy.
Anyone know how I might be able to fix these issues?
Hello everyone
I have recently rooted my g900v, which originally had kingroot on it. I used 'Advanced Signal Status' to change the network mode to GSM only, however, after installing Supersume, I am unable to change the network bands anymore.
In the settings, there is only Global, and LTE/WDCMA and the other bands, but not GSM only - the one I want.
I have tried launching the menu using an app from google play store, however it comes up with a java error.
I have also looked at service mode, but couldnt find an option for GSM only.
Does anyone know how to change the network modes?
Many thanks!
Good day
I am currently in Venezuela and I just received a Moto X pure literally just get it out of the box. When I plug the SIM on the device recognized it I could receive SMS and Calls but no data, no 3G no H+, no 4g. I double checked the APN and nothing. So I look some Info and found this app from the store called "Network" which i think its just a shortcut to the *#*#numbers#*#* anyway below there was an option "lte/gsm/cdma auto (prl)" i change this to other options to try to force LTE but nothing worked. So going desperated press the three dots menu on top and click "select radio band" and by mistake selected USA Band. Inmediatly lost signal and now the decvice doesnt recognize the sim card anymore. I tried to go back to this menu (select radio band) but the only options i see are "USA Band Cellular and PCS" none of this working for me. I ll really appreciate any help you could bring me cause i dont have a phone to replace this one. I also ask the moderator to move this post if this is not the right place for it, I ve been seaching for help but there is just too much information concerning radios, modem, and bands that i can really understand.
My carrier here is Digitel working with this bands
LTE 1800
3G 900
Hopefully you unlocked the bootloader and made a backup before messing with such things. If not, factory reset is probably your best bet.
thanks for the reply
I just did a factory reset and still the same... could flashing a stock rom help with this?
Likely reflashing the firmware will put it back to where you originally had it. If it asks you for a password for anything, it should be all 0's (00000).
If you use a OnePlus device specifically a OnePlus 3/3T then there's a really high probability that you've been effected by the unstable network problems(Data network automatically switching to 2G or 3G when the 4G signal becomes a little weak even though the device is capable of receiving the signal) caused when the signal strength is very poor. Even if you select 4G/3G only in the settings the signal becomes 2G.
If you are getting affected by this issue then you can solve this just by installing an app from the play store.
STEPS-
1. Install the app " JOnePlus Tools".
2. Open it and then click on "More Settings" icon on the top right corner.
3. After that click on phone info.
4. In phone info select drop down menu and choose the option, "LTE only" or " WCDMA only" according to your need.
5. Done.
I've been testing it for a few hours now and and haven't faced the issue.
If you are still not able to understand what to do then watch this video, everything done step by step.
But if you choose LTE only when there is not LTE the mobile signal is lost right?
vip57 said:
But if you choose LTE only when there is not LTE the mobile signal is lost right?
Click to expand...
Click to collapse
Yes.
Dial *#*#4636#*#* and in "Phone Information => Set Preferred Network Type:" select compatible settings according to your provider
OP3T Cellular Settings 1.1
Kartike said:
If you use a OnePlus device specifically a OnePlus 3/3T then there's a really high probability that you've been effected by the unstable network problems(Data network automatically switching to 2G or 3G when the 4G signal becomes a little weak even though the device is capable of receiving the signal) caused when the signal strength is very poor. Even if you select 4G/3G only in the settings the signal becomes 2G.
If you are getting affected by this issue then you can solve this just by installing an app from the play store.
STEPS-
1. Install the app " JOnePlus Tools".
2. Open it and then click on "More Settings" icon on the top right corner.
3. After that click on phone info.
4. In phone info select drop down menu and choose the option, "LTE only" or " WCDMA only" according to your need.
5. Done.
I've been testing it for a few hours now and and haven't faced the issue.
If you are still not able to understand what to do then watch this video, everything done step by step.
Click to expand...
Click to collapse
Install app OP3T Cellular Settings 1.1
davoudpro said:
Install app OP3T Cellular Settings 1.1
Click to expand...
Click to collapse
Link?
lover said:
Dial *#*#4636#*#* and in "Phone Information => Set Preferred Network Type:" select compatible settings according to your provider
Click to expand...
Click to collapse
Thank you for sharing
Kartike said:
Link?
Click to expand...
Click to collapse
https://labs.xda-developers.com/store/app/com.ebyt.op3tcs
This does not seem to work any more. I think since Android 8.
I tried the OP3T Cellular Settings 1.1 as suggested, but that didn't seem to work on my OnePlus 3T (Android 8.0.0).
However the Dial *#*#4636#*#* and in "Phone Information => Set Preferred Network Type:" as suggested by @lover, and then using LTE only worked perfectly. Thank you!
Bart9 said:
I tried the OP3T Cellular Settings 1.1 as suggested, but that didn't seem to work on my OnePlus 3T (Android 8.0.0).
However the Dial *#*#4636#*#* and in "Phone Information => Set Preferred Network Type:" as suggested by @lover, and then using LTE only worked perfectly. Thank you!
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down