PagePlus--#1:Standard Plan; #2 & #3:PT2000+Standard Plan
Feature phones require modifications to some files on the phone before settings can be changed to get internet to work on PPC. It can be a big job if you've never done it before. Do some internet searching and you should be able to find instructions.
I've heard of the LG VX9600, but I've never heard of a Samsung SCH-U80.
............ My PagePlus Phone History---11 Years & Counting
Ericsson AF738, Jul 01 - Dec 03, Std Plan, $30/Yr
Qualcomm QCP 2760, Dec 03 - Feb 08, Std Plan, $30/Yr
LG VX-8600, Feb 08 - Apr 10, Std Plan, $30/Yr
Samsung Omnia SCH-i910, Apr 10 - Nov 11, Std Plan, $80/Yr
HTC Droid Incredible, Nov 11 - Present, Std Plan, $80/Yr