The un-carrier's second-quarter earnings report did blow investors away, with its 817,000 post-paid subscriber additions coming in at more than double the Street's estimates.
But at these levels, Cramer said that Verizon and AT&T could represent better buys than the Legere-led magenta giant.
"Now, AT&T and Verizon aren't un-carriers; they aren't cool in any way, shape or form. But as investments? They're beginning to be, let's say, among the best and their stocks are open for business for everyone who needs income and not just the capital appreciation that I think T-Mobile will continue to give you," Cramer said.