In many places yes, but still with a much reduced bandwidth allocations. Newer generations increase the spectral efficiency, so more throughput can be supporte

In many places yes, but still with a much reduced bandwidth allocations. Newer generations increase the spectral efficiency, so more throughput can be supported on the same spectrum. So the operators tend to move spectrum from old to new generations. This is not immediate and there are a lot of differences from one operator to the next: in an area with low demand it's more cost efficient to keep using the old hardware as much as possible for example, until at some point using new more efficient hardware is cheaper than maintaining the old one. Then there are contractual obligations: some 2G is kept around to support industrial M2M applications with contracts covering 10 to 15 years of service for example. Which is why there's quite a lot of differences from operator to operator. Still, the trend is always there. What changes is the transition speed.