mobile network doesnt work - Galaxy S6 Q&A, Help & Troubleshooting

I have an interesting issue... I dropped my phone on floor today. When I take my phone to my hand, It was writing "Insert SIM CARD" on screen. I tried everything but mobile network isnt working...
I tried to clear sim socket, reset networks, turn off/on phone, another simcard (also not working)
Do you have any other suggestion?

Related

SIM was not working anymore "invalid network mode" - what happened there?

Hello
A few weeks ago, I did something stupid.
I went into the *#*#4636#*#* app, phone info and pressed some of the buttons.
I think the button was "cellinfostrate <number>", altough I am not sure, but it was a button there.
After pressing it I lost the mobile connection. I couldnt get it up anymore, the SIM card was not working anymore even in another phone (LG G3). I think it was an IMEI problem, but not sure. I got errors like "invalid network mode -1" in the cell network settings.
I got an exchange for the SIM and it is working again.
But the question: What happened there? Why did the SIM was not working anymore?

[Completed] SIM card detected but no signal

Hi, I recently got an Infinix HOT 3 LTE. It's a really great phone, but I have a problem with it, my 3G SIM card isn't working properly.
When I insert it and start the phone, the card is detected, I enter my PIN code, then when I try to make a phone call it says "Cellular network not available". I tried switching the SIM card slots, both didn't work for my card. Then I tried to change the network provider manually and all and I also tried changing other cellular network options over and over again but nothing worked, I also tried switching airplane mode on and off. I got frustrated with this problem and I decided to factory reset my phone, but the problem was still there. After that I tried using someone else's 4G SIM card, and it worked, so there's no problem with my phone or SIM slots. My 3G SIM card is fine I think, it works on my old phone, as well as others.
Please help if you can.
atkinss said:
Hi, I recently got an Infinix HOT 3 LTE. It's a really great phone, but I have a problem with it, my 3G SIM card isn't working properly.
When I insert it and start the phone, the card is detected, I enter my PIN code, then when I try to make a phone call it says "Cellular network not available". I tried switching the SIM card slots, both didn't work for my card. Then I tried to change the network provider manually and all and I also tried changing other cellular network options over and over again but nothing worked, I also tried switching airplane mode on and off. I got frustrated with this problem and I decided to factory reset my phone, but the problem was still there. After that I tried using someone else's 4G SIM card, and it worked, so there's no problem with my phone or SIM slots. My 3G SIM card is fine I think, it works on my old phone, as well as others.
Please help if you can.
Click to expand...
Click to collapse
Greetings and welcome to assist. Are you sure the phone is compatible with your carriers bands? If you are sure try asking your network provider for a new sim
Good Luck
Sawdoctor

Help with s8+ roaming connectivity

I am currently in Italy using a Vodafone UK sim card, it's been working perfectly (apart from randomly dropping complete signal periodically) but now it's just completely died, as in it won't find a signal at all to connect to any network let alone data roaming. I have contacted Vodafone who said there's nothing wrong at their end and the worst thing is it was working perfectly till this evening. So now it sometimes says emergency calls only or just the ring with a line through it as it cannot find any signal at all. I have tried doing manual network operator selection and automatic but still nothing... Any ideas? It's a g9550 128/6gb
Update I now have 3g data but it says "no network connection" and I cannot send receive texts or phone calls, yet I have full data...
@nugget123
Consequences of buying a CN/HK variant....
They usually have network connectivity issues, not surprising. Try removing the SIM card, turning the phone off, wiping cache in recovery, insert the SIM card, and then reboot. Then manually go and search for a network in settings and force it to connect to Vodafone Italy, should work.
It's working now again, I didn't do anything lol it just started working on its own accord! I'm now in Switzerland and all is good. My life is empty without my phone
It always happens to me when abroad. I am on O2. I have to select network manually and pickup different to the one which auto connect shows emergency calls only. Looks like some cells allowing me to connect but won't pass through calls
Do you also have a usa/china variant?
No, o2 UK from Samsung

sim tray and network not working properly

a few days ago I switched from cm to AEX 7.1.2 on my moto g. Whether that has anything to do with it I don't know.
Anyway last night the phone was working fine then this morning I see that the cell network is disconnected and the phone doesn't see the simcard. However when I put in another simcard from a different network it works normally. I switch back to my sim and it works for about 20 seconds where I can make a call or text then it shuts down again and dowsn't recognize the sim then does again once I have switched the sims but only for 20 seconds. I don't understand what is happening to the phone and why it is doing this. I need help. I have tried picking different network modes from the list after inserting this code #*#*4636#*#* nothing has worked so far. I haven't systematically gone through each one at a time yet and the list is quite long. I haven't seen a list of modes that long before there are over 10 of them from auto prl to scdma etc... Some of them I have never heard of like the scdma one. wif and bluetooth are working ok if that means anything. Thanks for any help
Also when I go into settings the network section is greyed out and under prefered network type it says Invalid Network Mode (-1) Ignore. I only tried changing the modes when this problem arose my changing these modes was not the cause
i've had similar issues, when i skipped using mobile data for a long time, my non-data SIM would dropout intermittently. i changed SIM slots didn't solve it either. other SIM was fine in either slot. just before replacing what i thought was a faulty SIM, without turning mobile data on, i just set the problematic SIM for data. that solved mys issue. however, running mobile data on back on the original setting didnt cause any more issues either.

No netwok/Emergency Call only

I was traveling to and from US and India. 2 Days back when I entered London airport for US, my mobile did not show any signal what so ever. It was no service. It was working fine when i boarded the flight in US.
Now following things I have tried according to my knowledge
1. I tried disabling the sim card, changing from 2g-3g- 4g. No improvements.
2. I went to menu by *#*#4636#*#*, and trying radio on and radio off. Nothing
3. I suspected that antenna is damanged and it hardware problem.
4. But then this wired thing happend, while playing around when both the sim are active, I turn of the sim one, the mobile data is switched back to second sim. Then when i again switch back the sim 1, it is automatically configured for 2g. It gets signal, I can make calls and it works good. Moment I switch the mobile data to that sim the network vanishes and back to no service/emergency calls.
5. I figured that there is some problem with the sim, so I inserted that sim into old samsung grand mobile which 3G phone. It works flawlessly.
6. Tried other sims in the moto G, 4g dosent work for some sim cards.
7. By reading on I found that lot of people have this problem and have solved it by flashing firmware. I tried that too. Tried stock rom, new osprey 7.* Nothing seems to be working.
Any thoughts and comments are welcome. I am kind of frustrated by this small bug. Might be lapse on motolora part. If someone is still active in this community please help, reply.

Categories

Resources