I have a lady friend who fell for this scam. A poster put up a military guy profile and fed her the widowed, training troops in Nigeria to fight the bad guys. Has plenty of money but can't get to it. Fell in love with her sight unseen. He started asking for money, she started sending it.
He asked for a phone, she coughed up a great one and sent it. Asked him for a selfie and he had no clue. By this time she had cleaned out 16 k of her savings for him. She told me this, I couldn't believe that she was that dumb but she is old an lonely. That makes a perfect mark for these crooks. I am not sure that she has learned her lesson and really blocked him. I think part of her still thinks he's coming to her.
The guy texts in broken English, she talked to him on the phone and he has a Nigerian accent, claimed he had been there so long, he has started sounding like them. I wish I was making this crap up.