delete - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

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I'm with rogers and after updating, phone doesn't hold onto LTE signal as good before updating.

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Loosing 3G While on Calls -- ATT HSDPA

Has anyone experienced this before? I seem to loose 3G connectivity while talking on a call. I can keep talking... but the 3G icon disappears and I see an alert icon notifying me that I've lose data connectivity.
This doesn't happen all the time, but quite often. Sometimes, the icon with signal bars will have a small 'R' at the top left indicating that I may be in Roaming mode.
I've got the ATT Nexus One with Bell Mobility as my carrier (Canada). They have a pure HSDPA network with no 2G fall back, so I'm not sure how I could lose 3G and still be on the call... I've got 2.2.1 FRG83 with Stock Android and the phone is NOT rooted.
Any suggestions? Should I reapply FRG83 -- or the entire stock android image (is this even possible on a non-rooted phone)?
Not sure if this is the same, as I never go into Roaming mode... but I routinely lose my data connection while making phone calls. I'm on T-mobile, btw.
Is this something normal? Have you just ended up living with it?
I'm slightly concerned about missing an email or SMS during a call if data connectivity is lost. Although, I don't think that data is truly lost as Bell Mobility only has a 3G network, there is no 2G to fall back on...
Are you sure you're not roaming over other networks? I'm sure you are switched to another network, and the data is dropped because Android has a switch to turn off data (which has nothing to do with SMS, by the way) when roaming, and this switch is on by default.
When the data is dropped, I believe it's not re-negotiated until the end of your conversation, so if you're switched to a roaming cell tower for even a second - your data is gone until the end of your call.
If your cellular carrier has agreement with other carrier's cell towers and they accept roaming (which is sometimes the case, as I've learned from this forum) - you should turn that switch off to retain data even when roaming.

Losing 3g with stock Epic

I've got a stock non-rooted Epic and I seem to be constantly losing the 3g signal. It usually happens when I come out of airplane mode. I work in the basement of a hospital where there's no signal so I always put it in airplane mode. When I leave work I take it out of airplane mode and the signal bars come back, but not the 3g icon. If I check under Settings>About Phone>Status it says "connecting" under Network. If I try doing the System Updates, like Firmware, Profile, PRL, or Android, it will sometimes but not always bring back the 3g.
I've called Sprint and they had me go into the Service Menu and Restore the phone with my MSL. It worked the first time but now it doesn't seem to always work. My current PRL is 60674.
Same problem I had with my first epic. I couldn't get the 3G to come back up for over two days. Go get a replacement. The one I have now is flawless(knock on wood) good luck

Data Connectivity Dropping Cured

I just wanted to share my experience with some issues I had with my cell connectivity randomly dropping during the day and then randomly coming back. AT&T was no help what so ever and their only solution was to wipe my device (I'm rooted).
The Cause: Crappy LTE coverage in my area
I live between two towers that offer LTE coverage in my area, but not close enough to one or the other for them to connect. I solved the random drops by disabling LTE in the networks menu and then also going to *#*#INFO#*#* and using GSM only in that menu. I miss no more calls and everything works now. Apparently the phone was trying to get on LTE, succeeded in a handshake, and then didn't have enough signal to continue. It would then drop and try to reconnect several times before attempting to jump back on the GSM tower I can throw a rock and hit.
I can only hope AT&T gets their crap together and I hope this helps anyone with similar issues

[Q] Signal Issues after upgrading to 5.01

Before I try a factory reset I wanted to see if anyone else had this problem. Have a unlocked rooted AT&T Galaxy S4 SGH-I337 running 5.01 on straigh talk. Before the update I had great signal strength and data speed even though I'm located in a rural are in eastern oregon but after the update my signal went to crap. Where I use to have full bars I now consistantly get two or it will lose signal and regain it continually through out the day. It seems to only happen when I have my data on, it will just drop and show the circle with the diagnol line throught it. Is anybody else experiancing this? Also I'm still using the same apn settings (which worked great)as I was on KitKat. It's almost like 5.01 messed up the radio.

Signal sticking

1st time having sprint but not my 1st HTC, me and my wife both have the HTC 10 and both our phones seem to be getting stuck on bad signals, I put us an app called radio switcher to lessen the problem, if we go into an area that has bad signal our phones will carry the 1x signal seemeingly for ever even if we go back in to lte or 3g, sometimes our phones will show no signal at all but we can use the radio switcher and choose LTE only and get 3 bars like instantly then it goes back to nothing if we put it back on auto, we have 3g almost every where here but our phones just love to hang on to 1x for some reason, hers is bone stock mines bootloader unlocked TWRP and latest viper rom
mech_supernova said:
1st time having sprint but not my 1st HTC, me and my wife both have the HTC 10 and both our phones seem to be getting stuck on bad signals, I put us an app called radio switcher to lessen the problem, if we go into an area that has bad signal our phones will carry the 1x signal seemeingly for ever even if we go back in to lte or 3g, sometimes our phones will show no signal at all but we can use the radio switcher and choose LTE only and get 3 bars like instantly then it goes back to nothing if we put it back on auto, we have 3g almost every where here but our phones just love to hang on to 1x for some reason, hers is bone stock mines bootloader unlocked TWRP and latest viper rom
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hmm, what is your location (or the general location where this happens). I have had all the htc one phones on sprint and have never dealt with anything like that. The only phone that would 3g camp that i had was the nexus 5. Send the location if you can. Also, try this, it wipes the phone but you can do it to test to see if it helps. You can reset the network config of the phone by dialing ##786#, click the menu and reset. IT will reboot into recovery to wipe since you have twrp just reboot the phone once twrp opens. It will go through the activation process. On your wifes phone i suggest doing a couple profile and prl updates.
I live in wilkesboro NC

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