Can I activate a phone I'm buying from eBay at Boost Mobile? It is an Apple iPhone 7 Plus GSM+CDMA unlocked?

Can I activate a phone I'm buying from eBay at Boost Mobile? It is an Apple iPhone 7 Plus GSM+CDMA unlocked?
Can I activate a phone I m buying from eBay at Boost Mobile It is an Apple iPhone 7 Plus GSM CDMA unlocked

No, it needs to be compatible with Sprint to activate on Boost.

Maybe. Get the IMEI number from the seller and check it's compatibility on Boost's website