It is not yet possible. Not even the Vzw iPhone 5 has ever, to my knowledge been made to work on PPC. The only close possibility is to purchase a Straight Talk iPhone 5, which already has 4G disabled at the factory, and can be used on PPC with no modifications required.
Originally Posted by keyz16b
My PagePlus Phone History---12 Years & Counting
*Ericsson AF738, Jul 2001-Dec 2003, *Qualcomm QCP 2760, Dec 2003-Feb 2008, *LG VX-8600, Feb 2008-Apr 2010, *Samsung Omnia SCH-i910, Apr 2010-Nov 2011, *HTC Droid Incredible (CM7.2 ROM), Nov 2011-Jun 2013, *HTC Droid Incredible 2 (CM7.2 ROM), Jun 2013-Present