Best Buy offers the Samsung t199 3G Dual-Band No-Contract Prepaid Smartphone for T-Mobile in Black for $6.99. Opt for in-store pickup to dodge the $2.98 shipping fee. That's a buck under our mention from three weeks ago and the lowest price we've seen. (It's also a current low by $11.) Features include a 2" color LCD, text messaging, 250-entry phone book, SIM card, five hours of talk time, and six days of standby time.