Database Users

Strange Network Problem HD2

I bought unlocked, sim free HD2 inserted the sim of my usual Mobilink network the phone wizards automatically configured the setttings but to my strange I cannot dial or receive phone calls, I am receiving and sending sms perfectly the phone GPRS working alright tried different methods of changing band but nothing is working to dial or receive voice call. In order to check if there is problem itself with the phone I tried different network (Ufone) sim and the phone is working perfectly without any problem so I am stuck that I cannot use my network which I normally use and I dont want to switch network, if somebody can help to fix this problem.

[Q] Connection problem or invalid mmi code (nexus 4)

My problem here is that i can recieve calls and message but cant call or send a message..
The network signal is full.
My wifi radio is working perfectly.
I can't work with mobile data.
funny thing: I can't call customer care..

i faced this too
Hi
I faced this too
I typed in*#*#4636#*#* and in phone information I set the Prefered network type to GSM only

[Q] N900W8 not registered on network?

I have an N900W8 note 3 and recently out of nowhere I started to get a message saying "Not registered on network" every time I try to make a call. The strange thing is that it only happens in some places, as if it were a problem with signal, but i always get at least 3 bars. I don't think it´s a problem with imei because every now and then i can make and recieve calls when I´m in certain places in the city. I have it rooted running android 4.4.2, the problem began before I updated it when I had 4.3. Its running stock touchwiz rom, and I already tried doing a factory reset to no avail. I also tried changing the network mode to 3g, GSM, and manually registering on the network (Telcel) but it still gives me the Not registerd on network message..... Any help?

MaximusiLx said:
I have an N900W8 note 3 and recently out of nowhere I started to get a message saying "Not registered on network" every time I try to make a call. The strange thing is that it only happens in some places, as if it were a problem with signal, but i always get at least 3 bars. I don't think it´s a problem with imei because every now and then i can make and recieve calls when I´m in certain places in the city. I have it rooted running android 4.4.2, the problem began before I updated it when I had 4.3. Its running stock touchwiz rom, and I already tried doing a factory reset to no avail. I also tried changing the network mode to 3g, GSM, and manually registering on the network (Telcel) but it still gives me the Not registerd on network message..... Any help?
Click to expand...
Click to collapse
Possibly a SIM card issue, OR and I say this lightly - IF you bought the phone used it's possible it may have been reported lost/stolen or the original owner broke their contract and the network have blacklisted it

Unable to make/receive calls on S5, Data OK

I have a really frustrating problem with my S5 (900F) where I can't make or receive calls.
I initially assumed it was a bug in Cyanogenmod 14.1, as that's when I first noticed the problem; however today I have flashed stock firmware on the handset and the same problem persists. I can see a signal and if I disable WiFi I can see HSPA/3G data in the status bar and can browse, but if I try to make a call it immediately disconnects and I cannot receive calls either.
I have moved the SIM card to another phone and can make and receive calls there, so I am sure the SIM card is OK.
Any suggestions would be gratefully received!
Chris

No service after returning from abroad

Hi,
I have returned to the UK from abroad and I no longer connect to a network operator. My mobile network operator is not listed when I search for available operators. I cannot connect to any of the those that are listed.
I am running an old CM13 nightly.
I have rebooted the phone. I have removed and replaced the SIM, both while the phone was on and off. I have reinstalled a nandroid backup from before I left to go abroad. Nothing has worked as yet.
Turning the radio off and then on again using the *#*#4636#*#* code does nothing. It lists my IMEI number at the top; however, this is not the same IMEI number that is shown when I check my mobile account details with my network provider. Is this the main issue?
I am unsure what to try next. Any help or recommendations would be appreciated.
Thanks.

FIXED
The strangest thing - it's now working.
After a few days of googling and getting absolutely nowhere, I put the SIM into my wife's phone assuming it wouldn't work - and it didn't. But when I put it back in my phone, a signal was found immediately. Calls outgoing and incoming are fine, and I have received a text.
How odd.