How to Solve Samsung Galaxy S4 Network Problem? - Galaxy S 4 Q&A, Help & Troubleshooting

Problems
No Network
Signal Dropping Issue
Low Signal
Too Much fluctuation in signal strength.

Which phone do you have? Which ROM?

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Fluctuating signal strength antenna

I experience a lot of fluctuation in the signal strength of the antenna of the Galaxy S. Without touching the signal sometimes drops from from 3 to 1 or even from 4 to 0...
Is this a know issue with this phone? My phone has stock firmware with one click lagfix (and root).

[Q] Now i9023 WIFI signal is weak? can fix ?

Now i9023 WIFI signal is weak? can fix ?
the same here also weak wifi signal

[Q] Very poor signal

I have Saunalahti service provider which works in Elisa's network and the signal is very poor and I think this problem appeared after updating to .35 kernel. Now I have AuroraICS, but the same problem was with miui.
The AP is very close, I can actually see the mast and I used to have very good signal. Also weird is that signal can sometimes be like -98 dbm 8 asu, and suddenly at the same spot it changes to -107dbm and 3 asu or 0 asu. So what could I do? Is there any boost for signal or changing the air interface? Just feels like it's automatically changing something and that's why signal gets suddenly weak?

improving signal strength on S5

i had better signal strength with my s4 than my s5.
In areas where I used to get "service" on my s4, my s5 is getting nothing, no service.
Is there a network setting that I can toggle to improve its signal strength ?
thanks for any tips

Problems with network selection?

Hi, I've noticed that my G6 in low signal area tries to switch to 3G or worse but with almost zero signal (no bars, only the icon) whether there is a "medium" 4g signal (1-2 bars), anyone noticed same problem? The easy fix is to force LTE only but it blocks completely the calls

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