On Thursday, January 10, 2013 2:29:30 PM UTC+1, wrote:
I have a friend that is using his android phone as his nav computer. He missed scoring a race day because having forgotten to place the phone in "aircraft mode" a call interrupted his IGC trace.

This was indeed an unfortunate problem with XCSoar, but I fixed that last spring (version 6.3.3).

Nowadays, I got a second SIM card for my Streak, to be able to use SkyLines live tracking. Rarely, I get a call during the flight, which is a bit annoying, but it never disrupts XCSoar.

(Note: if that problem still occurs, why doesn't your friend talk to us?)