Well, the PRL–preferred Roaming List–update to our phones didn't help at all. So, Cyndi and I went back to the Sprint store to have them checked out. We had to leave our phones there overnight, so Sprint gave us a loaner phone to try. it was a Sanyo RL-4920. Just an FYI, it had no issues last night. No dropped calls. No garbeled calls. Everything sounded great. I'll let everyone know what happens when our current phones are upgraded.