Cornerstone are moving onto upgrading more larger rural masts now, at least in my area anyway..
Not seen many 2g only ones getting done yet but upgrades to older 2100mhz 3g sites which often had panels only facing in limited directions like towards roads and towns, now have better, all round panels with better backhaul, 900mhz 3g along with the 800mhz 4g meanibg they now travel far into the countryside. If only they could get a few more upgraded.