I‘ve recently gone through three replacement phones: all MyTouch 3Gs. They exhibit the same symptoms: freezing, restarting, and general failure with respect to functioning as a phone. Through a bit of experimentation, I’ve come to determine that this is a memory issue.
MyTouch 3Gs (along with most of T-Mobile’s Android-based phones) have 512MB of internal memory. Apparently, my Gmail account (what you use to authenticate against the device) is too large for the phone to sync with. I know this because signing into the phone with my Google Apps account (willie at williejackson) allows the phone to behave normally…for a while.
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