Using mobile GPS in flight

[Odai]

Hello,

I am currently getting on with my PPL training, and have been doing some solo cross country flying. I recently had an idea that might help with my training.

I was thinking of using software on my phone, in conjunction with a GPS connection, to log a track, which can be imported to a program like Google Earth. The idea is that I can see exactly what the actual track made good was on a solo flight. This would all be for review purposes, post-flight, as opposed to using it in lieu of a proper inflight GPS device to help with navigation.

I am just wondering whether it would be safe to use such a setup in flight. The phone would be accessing both the cellular network and GPS satellies. Should I be concerned about interference with radios etc?

This is all assuming of course that the phone can accurately log and store the data whilst moving at around 100kts.

Thanks

Odai.