Cramer's lightning round: Nokia is a buy

• It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Clover Health: "Why do you want to traffic in Clover? No, thank you. That's a two-leaf clover. I don't like their business model ... go into UnitedHealth."

Nokia: "They're making a comeback ... at $5.80, believe it or not ... Nokia's a buy."

Clean Energy Fuels: "Long-term spec."

Plug Power: "Jimmy Chill says, 'during the first week of August, Plug Power reports, and if they screw up then I'm going to have to bring me the head of [CEO] Andrew Marsh because they have got to put up good numbers. They have to ... They must put up good numbers."

Inseego: "[CEO] Dan Mondor has worn me out. That has been a series of broken dreams, that stock. And I'm done with the broken-dream stocks."

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