hi everyone i am from california . i am having a cell phone of htc company model number htc evo . now its signal strength is getting weak day by day so i am thinking that i should buy a cell phone booster but the problem is this is my first time to buy any cell phone booster so i am very confused that which cell phone booster i should buy as i do not know the quality of any cell phone booster so i need your help to know about the quality of cell phone booster . so i should know whether i should buy at&t cell phone booster or not if yes where can i get at&t cell phone booster ?