trouble with activation lg flex

[trakzrevis]

Bought a phone from ebay. Ive done this previously with no issues. Try to activate this phone and the number is not recognized. Sprint first told me it was an iphone number then i get told no make or model. Went to sprint store for a sim card to no avail, they tell me its possibly been flashed to another service. First time ive dealt with this and trying to get any info i can on what to do. I feel if i take another trip up to the store its going to have me walking out disappointed yet again. Any help, tips, suggestions would be greatly appreciated.

[deathtrip]

It's likely the device was used on a Sprint PLBL (Usually a prepaid provider that allows Bring Your Own Sprint Phone) prepaid service.

Check it on Kajeet's ESN Check tool.