Welcome to the PlayStation Community.
My internet shows up fine, and if my PS3 is moved around, it stays at the same %, though it usually changes. I can't log into PSN. Why is this?
You're probably going to have to give us a little more information.
Are you using a wired or wireless connection for your PS3, do you have other items like laptop / PC's, cellphones & iPads etc connected to the same interent?
What percentage are you averaging?
I assume you've tried the usual re-booting your internet etc?
Customer Service - 1-800-345-SONY (7669)
Account & billing Support -1-877-971-SONY (7669)
Available Mon to Fri 8am - 8pm PST
Live Chat Available Mon-Sat 6am-10pm PST & Sun 6am-8pm PST