Need help with signal strength issues.... [CM13] [D800] - G2 Q&A, Help & Troubleshooting

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?

Related

Dropping Signal

Hey there people.
Hoping I've not missed an existing thread.
I'm having problems with X10 dropping its signal seemingly through its own free will. Had phone since mid april and not had any problems with. But the other week me and the missus noticed occasionally i wasn't receiving texts she had sent me. This happened every now and again for a few days. I then noticed when i picked up phone it'd show signal on 3G as maybe 2 or 3 bars then suddenly drop too nothing, showing the little x indicating no signal. After a few seconds up to a min it'd pick signal back up and work again. I no for a fact its not me been in an area without 3G coverage because it happens at work and until this started happening i got a strong 3G signal there. It doesn't seem too switch too edge either any more. Its set too GSM/WCDMA prefered. I'm on 02.
Anyone else have similar problems or any clues on what the problem it.
Cheers

[Q] Signal Issues

Hi all,
I have an SPH-L720 (not a SPH-L720T). Everything was fine with it on NAE firmware and CM11 nightly.
Recently, I used the upgrade available on my line to get a family member an SPH-L720T S4 for her line. When it activated, it kicked my phone off, but then I just did an ESN swap online. No biggie.
My S4 is back on the original line. So I went back to stock to update profile and PRL. Everything seemed fine. This was 3 days ago.
Since then, I have had poor signal or signal cutting in and out like crazy. I even thought it could be ROM related so I flashed back to Stock NAE and was still without signal in a place I KNOW had decent signal for a full day.
Given I have been on the road and drove 700 miles the past couple of days, I can't say what signal should be. However, most of the time my phone has said "NO SIGNAL", two of my family members have S4's and have had at least a bar or two of 3G.
I have seen digital roaming quite often, and also LTE has been great in high signal strength areas. I have seen non-roaming 3G, but not very often.
Any idea what could cause this?
Also, I know this is ROM related, but why is there no longer an APN menu to switch or edit them in CM11? I am actually wondering if the phone isn't switching APNs properly.
I am going to go back to stock right now and see what I can find out.

Signal problems after flash.

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.

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.
Click to expand...
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.

Sim card issues...on 21s?

It looks like on two different 21s based ROMs, my signal keeps dropping (as in it says no network signal found). I have to reboot for it to come back. At first I thought it was a fluke, but this time it happened overnight. I rebooted and received a handful of texts shortly after it regained signal. Trying to figure out if this is specific to my device or to 21s.

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