Bis Connection Keeps Dropping`

[2008bangkok]

I am connected up to True Blackberry plan and im having the BIS connection drop quite frequently, it normally happens when i switch from wifi back to edge I lose the BIS connection( i can tell as when EDGE is captialised it is connected and when it is lowercase it is disconnected)

I have tried this on a 9700 with OS6, 9800 with OS6 and now I have a 9780 with OS6 so the only 2 things in common is they are all running OS6 and they are all connected to True.

I have tried all different OS versions but still the same..

Is any body else having these problems with OS6 or with True?

cheers

BKK

[2008bangkok]

Nobody has a Blackberry on OS6 or Blackberry with True?

[lomatopo]

http://www.truemove.com/blackberry/en/get_connect.aspx

I might stop in to a True shop and ask for some help? The BB users I know use One-2-Call.