AT&T announced that it will finish shutting down its 3G network by February 2022 . Verizon announced that will finish shutting down its 3G network by December 31, 2022. T-Mobile announced that it will finish shutting down Sprint’s 3G CDMA network by March 31, 2022 and Sprint’s 4G LTE network by June 30, 2022.
Read moreWhich technology is used in 3G?
The 3G systems and radio interfaces are based on spread spectrum radio transmission technology .
Read more