T-Mobile says it will retire the older 3G network acquired in the Sprint deal on March 31. It will shut down its own 3G network by July 1 . Verizon said it plans to decommission its 3G network by Dec. 31, 2022.
Read moreWill 3G phones still work in 2021?
Major mobile carriers will be shutting down 3G networks in 2022 starting with AT&T, which will make the change Tuesday. The switch will make some older phones and devices useless but will make way for more advanced services, including 5G.
Read more