iPhone 3Gs simcard trouble since iOS 5.0.1

Hey guys.. I had someting to say: Apple, you make me very sad in the last months! Why?

Well, with iOS 5 final, my battery go low very very very very fast. But iOS 5.0.1 had fixxed that. Okay, I think, all good. BUT IT DOENST!

Now, since iOS 5.0.1, I had a simcard trouble! When i putt my device in sleep and in my bag, it "lost" the simcard. When i wake up it again i can see how mein iPhone is searching for the simcard and in a few secounds, it finds the card.

My wife is devoloper and so she put the new iOS 5.1b1 on my device. (Because the thing cant be even worse, no call come in when my device is in sleep)

And yeah, the problem is still there.

Can somebody help me? 😟

(ne clear restore, i had do this with the beta)

(sorry for my bad englisch)