Updated with other model ROM - calls and texts don't work? - Galaxy S6 Q&A, Help & Troubleshooting

I updated my SM-S906L on Total Wireless from Android 5.0.2 to 6.0.1 with a ROM for the SM-S907VT. After I did this, I could no longer send and receive texts or calls. When someone sends me a text, it says "delivered," (presumably sent to the old firmware) and whenever someone calls me it goes straight to voicemail. I have tried reactivating my phone on the Total Wireless website, but since the IMEI didn't change it says the phone is already activated. Is there a way to fix this?

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[Q] Why does a disconnected phone still make outgoing calls?

I have a Verizon Blackberry that has been sitting in a drawer for 4 years. It was given to me when I was helping someone out with their computer. I am not sure where the phone comes from originally. It was wiped when I received it. The other day, I gave it to my little sister so she could play with it, and she immediately tried calling my phone. The call went through. I haven't ever activated this phone, but it can make outgoing phone calls. All outgoing calls show up as restricted. It can't receive or send text messages. When I try to call the number that the phone says it has, I get a generic voicemail and the phone does not ring. Noone ever answers the number, or calls me back if I leave a message. On outgoing calls the 1 and the area code have to be dialed, otherwise I get an error message saying that this phone is not active at this time. Does anyone have any idea what this phone is or why it still makes outgoing calls?
Bump... any ideas?
Sent from my ADR6425LVW using Tapatalk 2

Cannot receive calls on YOG4PAS1N0

I am using Stock Cyanogen OS 12.1 YOG4PAS1N0, Build Number - LMY48B with T-Mobile.
I am facing a weird issue where I cannot receive any call. The call directly goes to voicemail after a couple of rings. There is no notification of the call at all on the device. I can make a call and send/receive texts. I can also connect to 4G and Wi-Fi. Everything else also seems to work fine.
Any suggestions would be appreciated. TIA

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?

Can't receive calls, have to cycle airplane mode to activate data

Hello, so I recently went from sprint to t-mobile, ported my number, etc. The plan was to flash U onto my g930p but I'm stuck on sprint's qjp3/series 5 firmware until a compatible U or even T firmware is released. I have had a couple of issues with my device that have sort of popped up over the month or so I have been on tmobile, namely that I cannot receive calls, every time someone calls me they are sent straight to voicemail. I do receive notifications for voicemail and the voice messages themselves, but that's it. I can make outgoing calls, however usually the first attempt at an outgoing call fails, then further attempts actually dial. Also, upon restarting the device I always have to cycle airplane mode in order to get the data to catch and start working. SMS and MMS work fine. If anyone has any insight into solutions to these problems, particularly the not receiving incoming calls, I would greatly appreciate it.

Not able to receive calls and send calls. But able to send text and used data

My LG G Pro 2 is a Taiwan version and has the latest Lollipop update. Its the stock rom and not rooted. The phone has the issue above where it can't call or receive calls but it can receive text messages and use 4G data. When looking at the sim the phone says Call settings unavalible...
I have tested the sim with the LG G4 and it is fine. Any idea how to fix?
restore using QCN backup from a working device. i have this problem too. but no one here would help me with their QCN.
here's my thread, requesting for help. but no response.
https://forum.xda-developers.com/lg-g-pro-2/help/help-qcn-to-repair-lost-esn-t3835575
most active user was just asking for android 8 or 9 here
but none of them responding when someone asking for a help. what a shame.

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