Hi I am from New York. I am having a cell phone of HTC company model number htc evo but i am having a great problem with it the main problem is the my htc evo cell signal is not of good quality. I am having a connection of AT&T. So I am thinking that rather than changing the cell phone or service provider I should buy a cell phone amplifier for it I think that will be a cheaper way to use my cell phone as it is. but I do not know which cell phone amplifier I should buy. Tell me which is the best cell phone amplifier?