You have to bypass Palm Profile sign-in, as the HP shut down the profile servers a couple of years ago. Follow this tutorial for bypassing activation. Your phone will be fully functional and ready for installing homebrew apps from Preware and WOSQI. https://pivotce.com/2014/10/21/guide...n-2014-part-1/
I have a Sprint Palm Pixi, it's activated, and I cannot sign in, I've tried restarting a few times, it would not work.
As this appears to be your first post, but you seem to to say the phone is already activated, I'll back track a bit.
It's referred to in the article linked above, but the HP/Palm servers offering the app catalog and backup services were closed in 2015. New and reset phones start by trying to contact these servers and this process now needs to be bypassed on first use. https://pivotce.com/tag/shutdown/