Droid 4 (GSM) can make phone call and send SMS, but can't receive either - General Questions and Answers

I have a Droid 4 in Canada on Rogers Network. I'm running the Stock ICS (although I've tried with CM10/other custom roms as well) on the latest firmware. In the status page, my phone number is listed, as well as a good signal and the network I'm connected to. So I can make phone calls and send text messages, but cannot receive either. I can't exactly try another SIM card because it uses a Micro-SIM and I don't want to cut up another SIM to test it (yet), although my SIM works fine on my other android phones (Droid 3 and Captivate Glide). I've done a phone factory reset, as well as doing a fastboot through RSDLite to truly factory reset, but same result. I've tried making build.prop changes but they made no difference either.
Any suggestions? I don't see any option on the phone that "rejects" phone calls and SMS.

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Missing Phone Calls

My wife's phone is missing phone calls on ocassion, I have tried just about everything to fix it.
Her phones has stock JB with root right now - has up to date bootloader and JB baseband for the I9020a which is her phone type. We are using AT&T. I tried changing her APN settings and deleting them and restoring them. IMEI is the right one also. Changed the sim chip also, just in case.
Any thoughts on what is going on?
i noticed it too, a friend said she called me and i dint pick up, but when i saw my call log i dont see any missed calls
androxide rom

My Cellphone won't connect to network after 4.0.4 update

Hi all,
Yesterday, I've accepted to upgrade to Android 4.0.4, HTC Sense 4.1 build 2.40.666.1.
Now from that time, my cellphone won't make any calls, receive any text or w/e. The only thing tho, when I freshly start it in the morning, it connects to the 3G long enough to get my missed txt, voicemail etc. Then it disconnects.
The APN server is ok.
I've called HTC and they want to repair it under warranty. The thing is, I can't lose my phone for long period of time as I'm using it for work.
What could I do on my own?
UPDATED INFO
-Second factory reset. First one didn't work. Used the vol- button & power button to make factory reset. Without any APN names, my phone seems to connect to network. I call my GF's phone and it works. My GF sends me a txt but I do not receive it until I tried to call her. It disconnects frequently from network. Signal varies a lot 2 to full bar. I send txt and my GF receives it instantly.
Any help or hint would be appreciated !
Thanks!

Problems while calling and not able to receive calls

Hi, I own an N5 and I'm absolutely in love with it, and thus have recommended it to anyone asking which phone to buy next, now my father, who has never even used a touch enabled display went and bought one.
His N5 has a weird problem and I cant figure it out since I live quite far away from my parents and troubleshooting with someone over the phone is hard already but even harder with some one who doesn't know ANYTHING about phones or computers. Maybe some of you could shed some light on this?
He says that he can't receive any calls or messages, but make them fine. I should add that he has a weird GSM plan which allows him to use 2 SIMs simultaneously in 2 different phones, when you call him both phones receive the call, this thing is called multi-sim here in Finland and is only provided by one operator, I know that he has a data plan and everything so it should work as he has used it before with 2 different Nokias and with only one phone and the other SIM in a 3G usb modem.
When he has both phones on (the second one being an old Nokia brick) only the Nokia receives calls but both phones are capable of making calls, when only the nokia is on, nothing can be done. no call making or receiving and when only the N5 is on, no calls received but can be made.
He also added that when he makes a call with his N5 (while the nokia is turned on) a icon appears in the notification bar, next to the clock, battery and cellular signal indicators. Since he doesn't know much of PCs or phones he didn't know what the icon meant but described it as a "pie slice with horizontal lines through it" which I suppose could mean WIFI? right? If it indeed is WIFI then why does it only appear while making a call and dissapear when the call is terminated? He is using his mobile data (3G only) and does not have wifi turned on... this is what confused me the most.
So anyone with some idea why a wifi like icon appears while calling with a phone that is only capable of making calls, not receiving them, please help me I'll be visiting my parent this friday and will then be able to look at his phone but until then hes out of luck if none of you guys have any good ideas.
OH and a last mention, when he bought the phone (brand new) it worked flawlessly for a few hours, he made a few calls, received some and even got 2 text messages, so the phone and the SIM card have worked earlier, the fault isn't "out of the box"
EDIT: Just a thought, if he has managed to enable wifi calling in the settings would that cause this kind of behaviour? Just remembered that since 4.4 its right there at the bottom of the settings in the phone app, he could easily have tapped it by mistake since he just basically taps anything he find on his new and cool phone

Problems Handling Phone Calls (Call Waiting, 3 way, etc.) Verizon S5 on AT&T Network

Problems Handling Phone Calls (Call Waiting, 3 way, etc.) Verizon S5 on AT&T Network
recently bought a used Verizon Galaxy S5 (SM-G900V). It came with the lollipop OS. My service provider is H2O wireless (on the AT&T Network. From the outset, I had problems with phone calls, text messaging.
1. When I'm in a call, I'm not able to dial (Like to enter numbers for automated systems).
*I solved this one by going to:
settings>applications>call>
Scroll down to DTMF tones and change setting to long.
2. When I'm in a call, I'm not able to click over to calls on call waiting. When I do try to click over, I still hear the original call for a few seconds and then both calls drop and I get an error message that says "no sim or invalid sim". If I don't answer the call, both calls drop and I get the same message. The same thing happens if a try to make a 3 way call.
3. If someone calls me and I try to call them back, the call redirects to turn it into an international call and the call doesn't go through.
*I solved this using an app called prefixer
4. If I try to text message someone who called me, I get an error message back saying the phone number is invalid.
I figured I would have to root my phone to be able to make some custom changes. I first had to downgrade to kitkat (android 4.4.2) and root it and then upgrade with root using some very helpful posts and resources found on this site (thanks). When I downgraded, problems 1 and 2 went away (for number 1, I had to change my network mode, but that solution didn't work when I went back to lollipop). After upgrading beack to lollipop, all of these problems were there, though I was able to resolve 2 of them, the other 2 are problematic.
I think theres a problem with the way the phone is handling the AT&T network signal since they have a different type of network from verizon but i don't know.
I'm will in try to install a custom ROM, change settings in service mode, etc. I just haven't come accross any info to point me towards the right instructions. Alternatively, I may trade or sell this phone ant get an AT&T based phone. What do you suggest?

XZs on O2 UK "Invalid number" making calls

Hi
I just bought an XZs dual SIM version. I'm having a very strange issue with it.
I have two SIMs installed: one on O2 UK and the other on Three UK.
The three chip works perfectly. Can do everything, voice, data, SMS etc... all good.
The O2 chip however has a strange issue. Every phone call I make it says "Invalid number".
Even if I call using the international +XX XXXXXX type or if I call using the UK style 07XXXXX both say "Invalid number" and do not complete the call.
What is odd is that I can receive incoming calls to the number. SMS and data also works, just making outgoing calls fails.
I checked that the phone supports the bands that O2 uses and it does. It does connect to the network (as I said I can receive calls, use data, send and receive SMS but just cannot make any outgoing calls)
The phone came from Hong Kong, and both O2 and Sony have flat out refused to help because I didn't buy the phone in the UK.
But well, it's a mobile phone, it should work in my country even if it's from HK.
I cannot really understand why I can receive calls but not make them. The SIM card works in my UK Samsung S6 so I do not think it's a network issue.
I have tried setting it to GSM only as it is my work phone and I really only need it for making calls. I've tried WCDMA / 4G / 3G but nothing fixes it.
I have reset the phone. Checked carrier settings etc.
Lastly I have tried swapping the chips around, and tried it with just one SIM but still the problem occurs.
Please can anyone give any suggestions on resolving this issue before I have to send it back ?
Thanks!
never mind. i solved it.
it was a provisioning error by the network, contacted O2 today and they resolved it by doing some kind of reset their end, which they didn't want to elaborate on.
fixed now.

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