Develop Bugs

[Q] Help Needed: Service Mode on SM-T315

Hello,
I have a Samsung Galagy Tab3 8.0 (SM-T315) for testing purposes. I need to connect to an LTE network that only supports "Packet Switched" data connection (no voice services). To enable PS only mode i need to go into "Service Mode". On other samsung devices i can use the code *#197328640# in the dialer but this does not work on the Tab3. I have also tried some service mode enabler apps.
Does the Tab3 use an alternative code? Or is it possible to copy the service mode app to this device?
Thanks in advance!

Please check!
mervinio said:
Hello,
I have a Samsung Galagy Tab3 8.0 (SM-T315) for testing purposes. I need to connect to an LTE network that only supports "Packet Switched" data connection (no voice services). To enable PS only mode i need to go into "Service Mode". On other samsung devices i can use the code *#197328640# in the dialer but this does not work on the Tab3. I have also tried some service mode enabler apps.
Does the Tab3 use an alternative code? Or is it possible to copy the service mode app to this device?
Thanks in advance!
Click to expand...
Click to collapse
CHECK : http://forum.xda-developers.com/showthread.php?t=2586818

[Q] How do I enter the Field Test Mode?

Which code do I need to enter the Field Test Mode? *#*#2846579159#*#* is the only way to force 4G...

H815 CM 13 - Mobile network disappears

Hi. Recently I installed Cyanogenmod 13 on my LG G4 H815 (international, without any broadband) and I like it for some reasons, but I have one issue.
Sometimes my network connection (I prefer using 3G, but the same is with LTE) disappears and I have only GSM without internet connection. There was no such problem with stock ROM.
I flashed cm-13.0-20160721-NIGHTLY-h815.zip. I searched a little and found similar problem with CM13, but on OnePlus One forum.cyanogenmod.org/topic/118316-cm13-mobile-data-connectivity-issues/
Not much I found.
I attach my screen when problem appears: i.imgur.com/zntwdZu.png
Thanks for your help.

I checked some stuff with ADB.
1. netmgr is working
Code:
h815 / # ps -A | grep netm
radio 10063 1 23900 3472 v_datagram 7faeaf3fe4 S /system/bin/netmgrd
2. I can switch mobile data connectivity with commands
Code:
svc data disable
svc data enable
3. There is no any messages in dmesg while turning data on/off.
4. Reboot seem to fix this for some time.

This is known problem, see CM thread...
Switching back and forth flight modus should help

I cannot find thread you speak of. Would you share link with me?
Airplane mode is good idea. Also turning off and on rado in *#*#4636#*#* menu makes it work immediately.

I cannot find thread you speak of. Would you share link with me?
Airplane mode is good idea. Also turning off and on rado in *#*#4636#*#* menu makes it work immediately.

baldpale said:
I cannot find thread you speak of. Would you share link with me?
Airplane mode is good idea. Also turning off and on rado in *#*#4636#*#* menu makes it work immediately.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?p=67861068

Thanks

How to disable autoswitch network mode

Sorry, for my bad Englisg.
On stock firmware, when I change network mode to EVDO only, its everytime save this mode. I am enable and disable airplane mode, reboot phone, but network mode EVDO only everytime.
On all Cyanogenmod versions I setup EVDO only and change airplane mode or reboot phone, its automatically change network mode to WCDMA preffered or CDMA/LTE.
Cyanogenmod/LinageOS Roms has way to save selected network mode after reboot or change airplane mode? Or maybe its has adb commands to change network mode from CMD ?
Thanks

ModemProtocol/RAT Selection /Network Mode FAIL

In secret menu > Rat selection , network mode , evey choice says FAIL . I have no reception signal . Can anyone help?

Hidden menu
I'm having the same problem. It had worked when I originally unlocked my phone and put a simple mobile card in it. I tried to switch to my metro pcs card and now I'm not getting anything.
Help please.