In the US by 2030 both 2G and 3G will be a distant memory.
AT&T shut down its 2G GSM network at the end of 2016 and intends to shut down its 3G network early next year.
Verizon intended to shut down its 2G and 3G CDMA networks at the end of last year but delayed to the end of next year.
T-Mobile US is operating its 2G GSM network entirely within the guard bands of its 3G UMTS service (which means the bandwidth available is extremely limited) and while they haven't specified a set date for shutting down their 2G and 3G service they are no longer investing in expanding it (see the difference between their 3G[1] and 4G[2] coverage maps) and I don't see it lasting significantly longer than AT&T's or Verizon's 2G/3G networks.
Following the T-Mobile acquisition, the entire Sprint legacy network (2G, 3G, and 4G LTE) is going to be shut down by the end of this year with all customers being transferred to the T-Mobile network.
Dish Wireless's new cellular network (which is being built out as part of the legal settlement that permitted the T-Mobile/Sprint merger) will be entirely 5G from the start with no 2G, 3G, or 4G service offered.
AT&T shut down its 2G GSM network at the end of 2016 and intends to shut down its 3G network early next year.
Verizon intended to shut down its 2G and 3G CDMA networks at the end of last year but delayed to the end of next year.
T-Mobile US is operating its 2G GSM network entirely within the guard bands of its 3G UMTS service (which means the bandwidth available is extremely limited) and while they haven't specified a set date for shutting down their 2G and 3G service they are no longer investing in expanding it (see the difference between their 3G[1] and 4G[2] coverage maps) and I don't see it lasting significantly longer than AT&T's or Verizon's 2G/3G networks.
Following the T-Mobile acquisition, the entire Sprint legacy network (2G, 3G, and 4G LTE) is going to be shut down by the end of this year with all customers being transferred to the T-Mobile network.
Dish Wireless's new cellular network (which is being built out as part of the legal settlement that permitted the T-Mobile/Sprint merger) will be entirely 5G from the start with no 2G, 3G, or 4G service offered.
[1] https://maps.t-mobile.com/pcc.html?map=mvno-noroam-34
[2] https://maps.t-mobile.com/pcc.html?map=mvno-noroam-34l