[niko A7imbak]

Hello guys ! I have a problem with my galaxy s5 new (neo) european version ... the sim card of my region sometimes working and somtimes no ... when the network of sim card gone the phone shutt down and freeze in the black screen for a while ..

[B. Diddy]

Welcome to Android Central! Have you had the phone for a while, and it only recently started doing this? Or did you just buy this phone used from someone else?

Which carrier are you using, and what's the exact model number of the phone (in Settings>About Phone)? It might be important to see if the phone fully supports the carrier's bands.

[niko A7imbak]

The phone was sent to me (i live in morocco ) from my friend who lives in french ... It's a used phone .. model number s5 new SM-G903F

[B. Diddy]

Ok, and which carrier are you using (i.e., which company is the SIM from)?

[niko A7imbak]

Maroc Telecom (IAM)

[B. Diddy]

The phone ought to support Maroc's bands. Go to Settings>Mobile Data, and look for the option to select the carrier network -- is Maroc selected? Also, check the APN settings and make sure it's correct for Maroc:

https://www.androidcentral.com/what-...do-i-change-it
https://www.apnsettings.org/morocco/maroc-telecom-ma/

[niko A7imbak]

Thanks for response ... but bro the problem is on sim card it shows no service ...sometimes it working fine but when no service shows up the phone stuck or shutt down and freeze until i remove the battery and take it back

[niko A7imbak]

I don't know if this is a mother board problem o region problem ?!

[B. Diddy]

The fact that it's shutting down when there's no service makes me think it's either a motherboard problem or some major firmware glitch. The phone shouldn't shut down just because the cell radio has lost the connection. You may have to consider doing a factory reset, and if that doesn't help, then reinstall the firmware using Smart Switch (http://www.sammobile.com/forum/showthread.php?t=29914) or Odin (http://forums.androidcentral.com/amb...interface.html).

[niko A7imbak]

Thanks B.Diddy I appreciate your time 😊