Sprint is suing AT&T for what it calls deceptively branding its 4G network as 5G technology.
5G is the fifth generation of wireless technology.
It promises super-fast speeds, but building those 5G networks takes years.
In the meantime, AT&T has upgraded its 4G technology to offer speeds twice as fast as earlier versions.
It’s called LTE advanced and Verizon, Sprint and T-Mobile have done the same thing.
AT&T calls its network “5G Evolution,” and that’s what sprint says is deceptive.
AT&T updated its phones’ software last month to display “5GE” when they access the LTE advanced network.
Sprint is arguing that, along with AT&T’s advertising campaign promoting the 5G-evolution, is meant to convince customers they are using a true 5G network when they aren’t.