[Q] Sim card error in non-LTE zone on Cyanogenmod - AT&T, Rogers HTC One X, Telstra One XL

I've been getting a sim card error on both CM10 and CM10.1. Under 10.1 when I wake the phone it will give me a pair of pop-ups telling me that I need to enter a valid sim card and restart, and until then it says I can only make emergency calls. If I back out of these boxes it works fine. It was a similar message on CM10. I tried removing and reinserting the card with and without rebooting, and have read loads of threads of people with the problem but no mention of LTE zones.
I realized that this only happens when I'm at work,in a non LTE zone. When I'm at home in an LTE zone I don't get the error. Data still works at work but often the boxes keep popping up. I've selected data roaming, LTE/GSM/WCDMA, and ATT LTE pta.
Is anyone else having the issue going between LTE and nonLTE zones?

Bump. Has anyone else noticed a sim card issue going between LTE and non-LTE areas?

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[Q] Network mode cannot set to 3G

Just got my Nexus 5 today.
However, in Wireless&networks / Mobile networks / Network Mode, I can only set it as 2G or LTE but not 3G.
I am currently on b-mobile in Japan and my Nexus 4 works fine on the network.
Wondering is it some sort of bug of KitKat or is it somewhat related to the SIM card I am using...
seanyseansean said:
Probably the sim card. Mine gives me the option, but another n5 on a different network (o2/UK) doesn't.
Click to expand...
Click to collapse
hmm, in my case, I can see the 3G option, just that whenever I select the 3G option, the system would automatically reset it when I navigate to other page.
Is that also the case on your N5 with O2/UK sim card?
On the other hand, I will test my N5 on different sim card tomorrow.
I have the same issue. If I select 4g, the dot stays when I go back, but I only get a full bar 2g connection. If I select 3g and go back, no dot is there but I only get a 2g connection.
Sometimes this was solved in previous handsets by going into the service menu and selecting 3g/2g from there.
MarkMcLovin said:
I have the same issue. If I select 4g, the dot stays when I go back, but I only get a full bar 2g connection. If I select 3g and go back, no dot is there but I only get a 2g connection.
Sometimes this was solved in previous handsets by going into the service menu and selecting 3g/2g from there.
Click to expand...
Click to collapse
I also tried forcing the N5 to use 3G only (by going into the test menu with "*#*#4636#*#*" code) but it still does not work...
OK, so I tried the SIM cards from my colleges, and my N5 can connect to 3G without problem.
It's weird that my SIM card works perfectly well on N4 but NOT N5...
Did not experience such SIM card computability issue before...
httimchen said:
I also tried forcing the N5 to use 3G only (by going into the test menu with "*#*#4636#*#*" code) but it still does not work...
Click to expand...
Click to collapse
Works for me now. Went into that test menu and selected GSM/CDMA auto PRL and I now have 3g. Didn't have to reboot.
3G cannot set for Virgin UK Sim
MarkMcLovin said:
Works for me now. Went into that test menu and selected GSM/CDMA auto PRL and I now have 3g. Didn't have to reboot.
Click to expand...
Click to collapse
I am also having the same problem, purchased the Nexus 5 from carphonewarehouse, can set on 4G or 2G, but when i set to 3G and comeback, it resets. Is that a SIM card problem? I tried to go on testing mode and apply GSM/CDMA auto PRL, that also not working. Is that a KitKat bug?
Same problem on Orange/EE in the UK. I can see the 3G option but phone won't let me change to 3G. Option never sticks. Just stays on 2G. Any ideas? Is this a known bug?
Thanks 101
101_North said:
Same problem on Orange/EE in the UK. I can see the 3G option but phone won't let me change to 3G. Option never sticks. Just stays on 2G. Any ideas? Is this a known bug?
Thanks 101
Click to expand...
Click to collapse
i think it's not a bug.i think it's a hardware problem. i'm having it with vodafone italy.
Same here on T-Mobile Austria :/
Already changed SIM card, without success. Maybe provider related issues?
unexist said:
Same here on T-Mobile Austria :/
Already changed SIM card, without success. Maybe provider related issues?
Click to expand...
Click to collapse
I'm on straight talk TT&T with a new SIM card, but sometimes the network mode doesn't stick. No idea why...
replaced a new 3G SIM, no luck
Just replaced a new 3G SIM Card didn't work the 3G option for me - Chunghwa Telecom Taiwan.
But I can select 2G, and dial number to make a phone call, so the SIM slot seem works fine, maybe just configuration issue?!
And, also I find a very annoying defect of my Nexus 5 32G(White), when hard-reset or flash to Factory Image, my Nexus 5 32G white goes crazy!! it just keep stuck and loop at Google Logo (not even show the 4 circle animation), and won't boot at all!
And I finally find a way to make it boot, by keep trying repeat flash factory, erasing userdata, erasing cache etc. is every had this issue?
EE/T-Mobile (uk) and I can't select 3g either, well I can but it doesn't stick.
I have a similar problem, except I can only select 3G / 4G, and not 2G because the 2G option isn't even displayed!! So infuriating. It still works through the *#*#4636#*#* menu, if I select GSM only then it does indeed go to 2G.
Is it possible that the SIM is somehow telling the phone OS it can't do 2G only? This didn't happen with my old carrier (same phone, only just switched). I have a feeling it's caused by the same thing that makes my phone number show up as 'unknown' now, too.
I have the same issue, I tried two different SIM, on is a Straight Talk sim that is set up to use the ATT network and used a T-Mobile sim card, both were unable to keep 3G as a setting.
My Nexus 5 seems that reluctant to drop from 3g to 2g when 4g is selected i have given up and now just manually select 2g to make sure i have a signal (im out in the sticks a bit). Sat at the PC with 4g selected i get no signal whatsoever, with 2g selected i get an indicated full signal strength.
Why on earth the N5 is so reluctant to dip its toe in the 2g territory when no data is on is beyond me.

Mobile Network Not Available

Hi folks,
This is my first post on here. I'm having a problem with my phone which I think is quite unique and I hope someone on here can help me fix it before I buy a new device.
I have a galaxy nexus (maguro) running cyaogenmod.
Previously I was running CM11 (cm-11-20141115-SNAPSHOT-M12-maguro) from the CM website and updated it to CM12.1 cm-12.1-20160719-SNAPSHOT-YOG7DAO8DL-maguro) a few weeks ago.
When I rebooted my phone it was running very slow (and getting very warm) so I did a factory reset and re-installed CM12.1.
It started working ok but I noticed that my phone was displaying 'emergency calls only' even though the network reception in the status bar was full, displaying 'H' (3g) and allowing me to connect to the internet using 3G.
Whenever I make a call it states 'Mobile network not available' and I cannot send text messages.
I tried phoning O2 and they gave me a new sim but the problem was still happening. I then tried putting my girlfriend's EE sim into the phone and I could make calls/send messages. I also went to France on holiday and could use my phone to phone/text using my O2 sim abroad. Whenever I put my O2 sim into another phone I can make calls and text.
So basically it is only when my O2 sim is specifically in the Galaxy Nexus that I cannot make calls/send texts but can still use 3g.
Oh yeah when I go to Settings>Mobile Network Settings>Network Operators the following available networks are shown:
O2-UK
T-Mobile UK
3 UK
vodafone UK
Orange
When I select O2-UK is states 'cannot connect at this time. Please try again later'
I've tried re-installing the older version of CM11 and today I tried wiping the entire phone (internal sd card etc) and it is still happening. Can anyone help? Is there something else I can wipe, or setting I can change?
Thanks in advance

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.

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