Problem with mobile networking need help!

i have this 5s working just fine but i have problem with my mobile networking. I am coverage with good 3G signal. It gives me 3-5 bars. But i only get access to internet when i am in 5 bars 3G. 3 or 4 bars wont get me internet service. I cant even check my balance and barely make a phone call. I contacted my provider and it seems to be working fine. I tested my sim card on my iphone 5 and it works just fine. Tried another sim in my 5s and no luck. Tried resetting network setting and reboot. Cant help me. So can u guys help me troibleshoot this problem? Do i have some hardware failure?

 

I live in indonesia. My carrier is telkomsel. I dont really understand. So what is the solution