Signal problems after flash. - Galaxy S 4 Q&A, Help & Troubleshooting

Hello everyone,
Yesterday I've flashed new Phoenix rom on my i9505 and since then I have signal problems. I'm in great signal area and sometimes I have full 3g and sometimes (in the same place) I have no signal, just the crossed circle. The weirdest thing is that when I have crossed circle I can't call anywhere, but if somebody tries to call me, everything is working like if I had signal... Please, help me. I'll just overtake your replies about flashing new modem, because I've tried about 5-6 modems... Or maybe I flashed wrong ones? Waiting for your replies.

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No Reception

Hey guys,
I have been using the P3400 for quite sometime, it has an amazing reception quality. But a month ago, it decided to mess with my head and now it wont give me reception properly, sometimes it connect after 10 long minutes of searching for a network and sometimes it doesn't get any reception. I have tried cleaning out the sim compartment but it still has the same problem. I have also tried changing ROMS but nothing really happens, the problem persists.
I would appreciate any kind of help with this issue.
Thanks.

[Q] Weird HSDPA signal dropping issue

I have this weird issue with my hd2 flashed with a custom NAND android 2.3.3 rom.
When its on my bed or desk or whatever it has full strenght HSDPA signal but as soon as i pick it up it drops to 2 bars and then to 0.
It only does this when i'm holding it in my hand, also when i move it around i can see the signal strength switching from 2 bars to 0 and back again.
At first i tought it was the radio but after trying them all and trying other roms i'm still having the same issue!
Switched to 2G only now and my reception is always perfect at full strenght but now im on EDGE all the time...
Did someone here have the same problem and found a sloution by any chance?
thanks in advance!

Need help with signal strength issues.... [CM13] [D800]

A few weeks ago I upgraded to CM13, and it's been working great for me. However, about a week ago, I had been having some signal issues. It was almost impossible to get a signal in any building and I would have to go outside to get any sort of reception.
After a week of putting up with this I decided to flash a new modem. That made things worse. Now I have "No data SIM" error half the time, and sometimes I can get reception and even 3G, but then it goes away after 10 seconds. I've tried near 5 modems, and none of them have helped. I've looked at the blastagator modems, but all of the download links seem to be down. Can anyone help me out here?

Need help with signal strength issues.... [CM13] [D800]

A few weeks ago I upgraded to CM13, and it's been working great for me. However, about a week ago, I had been having some signal issues. It was almost impossible to get a signal in any building and I would have to go outside to get any sort of reception.
After a week of putting up with this I decided to flash a new modem. That made things worse. Now I have "No data SIM" error half the time, and sometimes I can get reception and even 3G, but then it goes away after 10 seconds. I've tried near 5 modems, and none of them have helped. I've looked at the blastagator modems, but all of the download links seem to be down. Can anyone help me out here?
try contact @blastgator, he usally replies.
zauzaupt said:
try contact @blastgator, he usally replies.
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Click to collapse
Thanks for responding, and I actually did a couple hours ago. Hope I get a response soon.
Unfortunately, that doesn't seem to help.

Serious signal problem

Hello, I would really appreciate your help on this problem I'm having.
My nexus 6p was working fine on marshmallow, one day I installed an ota update and lost signal, my phone showed no service, after that I spent a lot of time on researching untill​ one day I tried to restore an efs backup from someone else's phone and it was fixed, I got my signal back, the only problem is that the signal drops constantly which makes it unusable, sometimes I am on a call and it loses signal then comes back, I have tried everything from flashing stock, different radios, locking the bootloader, flashing chroma rom, changing radio bands...
I am getting frustrated, please help.
hey, tell me about that restore efs using someone elses phone. Where did you got it, can you help me? Im without service going crazyyy

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