These FreedomPop 3-in-1 4G LTE GSM SIM Kits drop from $14.99 to just $0.99, plus they include a free month of data and unlimited talk and text, at FreedomPop. This is the lowest price we found for one of these kits by $15. You'll be charged $32.98 per month after the free trial month is up, but you can switch to FreedomPop's free 200MB, 200-minute, and 500-text plan at any time, as long as there's a balance on your account. These SIM cards are compatible with any unlocked GSM phone. A 30-day money-back guarantee is included, and sales tax is charged in some states.