AT&T iPhone drop call rate more than twice of Verizon iPhone

According to latest Survey by market research firm known as ChangeWave Research reports that AT&T iPhone users drop call rate are more than twice of Verizon iPhone 4 users. You can see below, the percentage of dropped calls experienced by Verizon iPhone 4 users is only 1.8% compared to 4.8% experienced by AT&T iPhone 4…