Flash Sprint Galaxy S3 to Page Plus the Easy Way

Ok, so you have a Sprint Samsung Galaxy S3, [SPH-L710] and you want to Flash it to Page Plus?
[I'm assuming this will work for ANY carrier, but we all know what assuming does...]

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Sprint /Verizon/USCC S2/S3/S4/ Note 2/Note 3 to Page Plus / Selectel Flashing Real 3G

I want this to be a thread dedicated to help others to flash the mentioned devices to Page Plus / Selectel / Next-G / Service in REAL 3G....

I have been flashing phones for a several years now as a hobby and want to pass on some of my knowledge and advice to others making this transition.

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