Make sure you hard reset after upgrading

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I just upgraded to t-mobile 1.60... the upgrade went well and then it drove me nuts because
I got a no service error.

So I thought it was locked and followed the xda2unlock procedure, hard-reset into
bootloader mode (power+reset+action, make sure you sync all your files first) just to
tell me that my phone was already unlocked.

then when I finally reset my phone... the upgrade finished updating my phone and now it
works well.