The Cheapest Cellphone Plans in 2021 You could be paying as little as $6 per month, depending on your needs. Photo by YoloStock / Shutterstock.com If saving money is the most important thing to you in a cellphone plan, you’ve got a couple of different options. You can choose the absolute cheapest cellphone plan out there, but what if you want some wireless data or better cell service? Let’s break down the best value cellphone plans in 2021, depending upon what you want — including the absolute cheapest options if that’s your jam. The absolute cheapest cellphone plans The absolute cheapest cellphone plan we could find is from GenMobile, and will cost you $6 per month for 300 minutes of talk, unlimited text and 1GB of data. GenMobile uses T-Mobile’s network and even includes 5G access.