I personally don't mind the additional $10 fee. I've been on sero with 4 lines for years paying $30/mo each. I switched over to the everything plus family employee plan and pay just $5 more per line. Sprint has been saving me money for years so $10 won't kill me. It also helps that raleigh, NC is a full 4G area
Also, If I remember correctly, someone from sprint said that the $10 charge is not for 4g, it's what you have to pay for having the best phone in America.