wm6 and problems with phone function

[mobilexpi]

Hello friends:

I've a T-Mobile SDA USA (with WM6 v3.6) and it works fine, but sometimes the phone funcionality stopped working (i can't make or receive calls)..and I need to restart the phone to work fine. Any idea?
Best regards,

[kajdax]

I have the same problem with WM6 3.7 version, but restart device doesn't solve this problem :( .... sory for my english
yes last radio was upgraded

[mobilexpi]

Any idea about the problem?

[karhoe]

Have you guys run the latest radio upgrade?

[kajdax]

yes I've done everythink format radio and WM6 flash