My Motorola Milestone gets hot while making a call. I hope this isn't specific to my unit or the Milestone or a 850/1900 Milestone... Just wondering. Edit 3/2/2010: 19 minute phone call today. It started getting pretty warm by 10 minutes. I kept checking my battery widget (Battery Left). It topped around 41C or so. 41C at the end of the call. Loaded up Temp Monitor and it says 45C on the AK sensor. Sorry I work in celsius because this is how CPU temps are usually discussed in although I'm a F guy. So 45C => 116F. Most of the heat is near the camera area, but I guess that means the flip side where the earpiece is gets pretty warm. It's like holding a handwarmer to my ear. The battery cover itself is only mildly warm, not a problem.