With new activations, Mint Mobile offers a Mint Mobile 1-Month 8GB 4G LTE Phone Plan for $20. Plus, you'll get two additional months for free. That's a savings of $85 and the lowest price we could find. It includes a Mint Mobile SIM card and features unlimited talk and text. Additional taxes and fees apply. Note: After the initial 3-month trial is over this plan renews at $35 per month, unless canceled.