Since I asked you to do so I wiil respond:
I believe all radios, either FM/2.4 can be shot down, or suffer from interference no matter how much they harp on bullet proof, ect. If your flying 2.4 around power lines, or a huge amount of people your going down, or someone is. A phone, cell or land-line in the GHz range can cause problems. May not for some, but I've seen it.

He has an opinion I have mine. They differ. He offers no proof of his.

The BMFA (UK insurance), have made an advisory to all UK clubs that mobile phones should be kept away from flight lines.

You need to remember there are still people flying on 72 or 34(I think that is what the Brits use)

To put it very simply, if the noise level across the band of channels your 2.4gig system is flying on gets loud enough, your receiver won�t be able to decode its incoming data, regardless of its level of encryption or rejection.

Yea you got one. That is absolutely correct. Not very likely though.

t has nothing to do with the frequency we fly on, not even 2.4ghz is immune, it is radiated interference produced by cell phones that (COULD) not will, affect the electronic components inside the transmitter.
Can enyone honestly say they have not heard the speackers of a radio making a strange sound when a cell phone contacts the cell? it is electrical energy pure and simple. You may decide to just ignore the warnings, and never have an issue. But if ever an accident happens and it is down to this issue, will you be able to live with your conscience?

If you are trying to prove interference on 2.4 That is completely off the mark..