I have used my T-Mo BB 8000 v 4.5.0.55 and v1.01 of GPSED on numerous flights to track.
Examples: hkg to kul | Author Cchester | free Mobile GPS Tracking Service
yuldfw | Author Cchester | free Mobile GPS Tracking Service

Lately, I get cut off shortly after rotate (takeoff). Example: San Juan to Miami | Author Cchester | free Mobile GPS Tracking Service

Anyone have a similar experience? I really need to track the seat miles and trips.

And for those of you freaking out that I use it during a flight and want to site FAA flight regs, I offer this: It would be a horrible thing if my Blackberry 8800 GPS phone can cause a crash. Think of all the other signals that are 500 times more powerful and are being sent from terra firma to sats and that bounce off different atmospheres. Aircraft would be dropping out of the sky's like flys at a bug zapper convention.