hi

http://www.feko.info/applications/white-papers/design-and-optimisation-of-an-lte-mobile-phone-antenna

We have various classes of cell phones and power depends upon the class.

Examples:

Maximum output from a UMTS/3G mobile phone class 2 is 27 dBm. Similarly for class 3 is 24 dBm power.

This power will be fed into cell phone antenna. But this power may reduce due to duplexer losses and other feeder losses. This loss can be 1 to 2 dB.

Hi

Input power range for a cellular phone is generally between -100 and -20 dBm (depending on the link budget)

Best Regards

hi

http://www.feko.info/applications/white-papers/design-and-optimisation-of-an-lte-mobile-phone-antenna

Hi

http://www.antenna-theory