Just posted it on Motorola's support forums. I wonder if they will respond.
This was in Southington CT (route 10). Outside I had 4G, went inside Home Depot, stuck in 3G. Went back out, 4G, went to Shoprite across route 10 and checked my phone after couple minutes there and it was in 3G. In both instances my wife's droid Charge stayed in 4G.
Right now, sitting at home I have 3 bars in 3G, my wife's Droid Charge has 2 bars in 4G. I think you're getting the drift.
I was able to temporarily bring the phone back to 4G by goig to airplane mode then back, but it would go back to 3G soon after. I saw in other 4G thread an answer about Razr HD having different antennas, but thought it was irrelevant to the issue with this phone. What I haven't seen is Motorola acknowledging that there may be an issue and they are working on it.
I'm into day 4 with this phone and decision time is coming on whether to keep it or not. 3G is strong, wifi is strong but 4G seems to be abandoned too soon in favor of 3G. When in 4G, on two bars this phone has faster download speeds than the Droid Charge.
Ps. Just went into airplane mode and back. Phone is showing 2bars in 4G and between -107 and -114dBm. 4bars and between -77 and -84dBm in 1x depending on whether and how I'm holding it.
Pps. Mobile Network is set to LTE / CDMA.