having this kind problem sometime ago with other android samsung...

Source of problem :
the user keep changing SIM card form different provider (maxis/celcom/digi)

My solution :
Settings > Connection tab > More networks > Mobile networks > Access Point Names > delete all available APNs.
Then request new setting from your current SIM provider. ...

Just give it try.. who knows it might works for you...

Ur connection myb, try dl network refresh..

This always happen when Im in my office.The data connection will change from G to H+ and the signal varies from strong to weak until 1 point where I will not get any signal whatsoever and this will stay until i left the building and restart the phone. Sometimes restarting the phone will bring back both data connection and phone signal for a while. And this only happens when im in my office. Other than that, cant find any other solution except frequently restarting my phone when im there.

The one i'm using is network signal speed booster, dunno same or not.., but b4 u dl, try take a look at first at the comment section, is it reliable or not..

Myb can change network mode to wcdma only, so dat the fon can detect 3g instead of looking for 2g

before, i just use rm10 clear silicon case, yesterday i buy new case for my s4 only rm25..very happy...  [attachmentid=3491046][attachmentid=3491047]

Where do you buy it???online??

in network setting, use wcdma only..

Guys, help me out here pls. I'm using sme set 9505 which I purchased last weds. My problem is I keep getting data connection drops. Meaning it comes on and off. This is getting annoying, and I'm wondering if anyone else is seeing this? If it helps, I'm using digi. Thanks

OEM is a nice way of saying it's fake , copying the real one .

OEM products come in various grades. If you buy the highest of the lot then in every likelihood, it is good. But if you get a cheap one, chances are it will not function well and not last long.

Thanks for the reply. I think you don't need to restart your phone. Just toggle the airplane mode then it'll work.
Anyway, apparently, this is pretty common in xda forum. 

http://forum.xda-developers.com/showthread.php?t=2268320

I'm not sure why our dear forummers are not seeing this.
I believe there should be quite a few of us having the 32gb lte version?

Can the OEM case when you flip case cover , can it wake n close display? If so than is worth buying
As for quality of material used you have to look at it yourself to determine whether acceptable

how to check whether digi already activate my rm58 data plan or not? I bought my phone on 19th, until now I'm not able to connect to 3G, no H icon appear after I turned on the data plan.