This is an article in the WSJ. Sprint Offers Credit To Lure Outside Customers snippet: (Full article at the link above.)
Nice that Sprint is extending the credits and adding a little incentive for business customers. I just got the $50 credit for my dad's line this month, the $125 for my line should hit next month.
They ran a short promo like this a few years ago, except it was for referrals. It was something like $150 per person you refer and that person got $25. I made quite a bit of money on that offer.
Once you activate the phone line you have like two or three days to go on the Sprint website to sign up for the portingcredit. If you don't, you don't get it. Just did mime from ATT with four of my lines so far This deal better come thru lol