Firefly Unlocked Cell Phone for $17.19. Here is a screenshot for your reference. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order for free shipping. Note that it is compatible with GSM carriers like AT&T and T-Mobile and does not work with CDMA carriers, such as Verizon Wireless, Alltel and Sprint. It features up to 6 hours of talk time and 205 hours (8.5 days) of standby time.