The frequencies used on Cell Towers should not interfere with your RC equipment as the FCC keeps them separated as much as possible.
Here is a like to a discussion on this issue here on RCU:
http://www.rcuniverse.com/forum/m_86.../tm.htm#862826
Sincerely,
Krysta
Product Development & Support Specialist
Futaba Service Center USA
[email protected]