How long until 4G is obsolete?

The good news is that 4G LTE will be available for at least a decade to come , and will co-exist with 5G networks.

Will 4G phones continue to work? 4G devices will continue to work . Mobile providers are expected to maintain their 4G networks as they invest in 5G deployment. If your mobile device is more than a few years old, it may be a 3G device.

T-Mobile has listed the dates for shutting down Sprint’s 3G and 4G LTE networks, and migrating people to modern broadband speed pastures. These are January 1, 2022 for Sprint’s 3G network sunset, and June 30, 2022 for the 4G LTE connections, respectively.