WiFi and 3G signal issues after upgrading to 4.3 i9500 - Galaxy S 4 Q&A, Help & Troubleshooting

I upgraded my S4 i9500 to 4.3 and everything works pretty much fine except the WiFi and the 3G, lets start with that I don't have any signal bars on both of them. they are empty, it still works without the signal bars but it's working really really slow in games or browsing, I didn't have this issue on 4.2.2, anyone knows what to do?

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[Q] GPS / DATA issue

Hi Everyone,
I have flashed the ZVA update, with the OPTIMUS rom. Everything seemed OK but there's something I noticed, I barely get LTE now and whenever I am running 3G I lose GPS signal. It's visa versa too. If I get GPS signal, I lose 3G/Data capability. Does anyone have any advice?
gn.

No data but shows h+, toggle

Hi all,
Not sure if this is a problem as my network is upgrading to 4g, but recently I have on occasion seen h+ as my data signal but the phone will not connect at all. No Internet. Emails won't sync. Nothing. I have found that a restart seems to sort it out or flight mode toggle. This didn't always work though. This has only happened recently.
Anybody else have this problem, could it be the network upgrading? (Although I have only seen 4g on my phone once in a different location and the speed was not exactly great, I have seen over 20M on H+ and 4g was about 10)
Getting a 4G signal doesn't necessarily give you good speeds. 4G in our country sucks. I get 4G signal often but my speed still hover around 0.1kb/s up to 1.2mbps, but most of the time it's only < 600kb/s. Fastest I get is only 10mbps, that is around past midnight when everybody is already asleep. And yes, I also get H+ and 4G signals with 0kb/s speed.
The speed was more an observation than anything else, the issue is the fact that I have a network signal, I have H+ being displayed but no connection, as it sometimes clears with a toggle it would point to a phone problem surely?
I also experience that, even with my previous S3.
Guys I have the same problem. I just swapped from S3 to S5. I wouldn't like to change s3 but loosing connection was happening more and more often. Usually I was loosing data signal and only solution for that was rebooting the phone. Once I had to restart it 3 times in a row. Now I have S5 since almost two weeks and I noticed that sometimes I have H+ but I can't use internet at all. It's really annoying. Is it a problem with operators or phone? I am with EE now in UK but I had s3 in Orange.
I have saamung galaxy s5 g900f.my phone show h+ on stausbar but no internet in my room but when im on my hose roof internet is back.i have also s2 gti9100 same netwark fast internet on my room and my house roof. Help Help help
zargam ali said:
I have saamung galaxy s5 g900f.my phone show h+ on stausbar but no internet in my room but when im on my hose roof internet is back.i have also s2 gti9100 same netwark fast internet on my room and my house roof. Help Help help
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Stop hijacking peoples threads, make your own - you already had posts deleted for this exact thing

[Q] 3G and Wifi reception issue after lollipop update

they was working great. But after updating from Kitkat to lollipop I9505XXUHOB7 5.0.1
the 3g signal receiving is acting so weird. Videocall works smooth. Just i cant browse web smoothly. the download speed ups and downs making me angry. But 2g is also working fine. The issue is only with the 3G data.
Another is the wifi reception has also became decreased. No stable speed i get.
What u guys suggest?
I have flashed latest 0E4 modem and wifi fix but no improve. What u suggest?

[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.

[Q] How can I fix my note 3's signal reception?

So... my Note 3 is like new, no exterior damage at all, I've taken well care of it, but I'm having some problems with signal reception.
Using LTE/GSM/WCDMA mode (or LTE preff with CM based roms) where the phone prefers 4G signal, I have 1 or 0 bars of signal, I miss calls and texts and web browsing using data is really slow!
Using GSM/WCDMA (3G mode in CM based roms) I have like full bars but slow internet using data, I don't miss any calls or texts (at least I didn't notice it) but when I am in the train and I pass through a tunnel, the signal is lost and it never recovers, I have to remove my battery and reboot the phone to regain signal (my other phone, a Galaxy Nexus, loses signal only inside the tunnel, then in seconds it reconnects again like it should, I also have full bars everywhere and no problems with the same SIM card, I also have an LG G2 at home and LTE works very well with the same SIM on that phone, it's just Note 3 that has really poor or no reception at all).
I don't think this is normal and I don't renember having problems like this in the past, how can I fix it? Please help me since I can't find any info by browsing and everyone knows Samsung isn't cheap when it comes to fixing things with knox 0x1, and I am fine fixing it myself if I know what to do.
Do phones use different antennas for LTE and 3G/2G? Is it an antenna problem? How can I pinpoint the problem? How can I repair it?
Thanks in advance.
EDIT: forgot to mention, I've tested this on many custom roms (CM13, CM12.1, RR, N5 ports, S6 ports, Aryamod, Stock Samsung Lollipop, Stock Kitkat) the problem is the same everywhere so I think it is hardware problem.

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