Best Buy offers the Kyocera Rally 3G Prepaid Cell Phone for T-Mobile in Black, model no. S1370, for $3.99. Choose in-store pickup to avoid the $2.99 shipping fee. That's the lowest price we could find by $6. It features a 1.8" display, 128MB RAM, 256MB internal memory, microSD card slot, 0.3-megapixel rear-facing camera, and Bluetooth.