Mobile data stops working randomly

[Bakgrund]

So i got a problem with the mobile data in my Htc one s.

 

I can browse the web perfectly fine a while, then suddenly it starts to change icon to 3G instead of the hsdpa one, and then i just see the arrow up glowing, until it stops working completely, and a few seconds later it starts working again. I always got very good coverage, so coverage should not be the problem.

 

It can happen when i browse the web or do anything else that requires mobile data, works fine for one minute sometimes and other times it can take up to 15 minutes or even more than that until the problem start to shows up. 

 

 

 

What can i do to solve this problem, or is it normal?

[Ajirax]

I hear you brother... But I'm in France, my operator is Free Mobile and I'm using a Samsung Galaxy SIII, so I wouldn't say our issues are the same.

Mine constantly switches from H+ to 3G, H, and then H+ again and if I'm loading a page/video in the meantime, the connexion is lost and I need to refresh...

Usually it happens when I'm holding the phone, setting it down on a table or something helps...