In recent days, I saw some activity (workers installing new cabinets) at a tower just off I-40 in Pope County, Arkansas; this afternoon, I drove by the tower and saw what appear to be new (Ericsson) NV cabinets installed alongside Sprint's old Nortel cabinets:
http://i.imgur.com/ZstTX.jpg
The new cabinets are behind the older, bulkier cabinets. Sorry about the angle of the photo.
It doesn't appear that work (antennas/RRUs) has started on the tower yet - I'll be watching for those changes.