A judge approved the settlement as part of a broader deal that requires Sprint to pay $68 million over claims the carrier added unauthorized charges to customer bills.
Lawsuit accused Apple of luring away key engineers to work within a new battery division, fueling speculation that the iPhone maker has ambitions of developing an electric car of its own.
Judge Lucy Koh in August rejected the companies' initial $324.5 million offer to settle the case accusing four Silicon Valley giants of conspiring to stay away from each other's employees.
Apple and Google are among the companies accused of conspiring not to hire away each other's employees.
As part of its settlement with the Federal Trade Commission, T-Mobile will pay at least $90 million in customer refunds, as well as penalties and fines over complaints that it put bogus charges on customer bills.
After three previous settlement attempts, regulators say formal objections are the "logical next step" if the two sides can't come to an agreement.
CNET's Marguerite Reardon explains to an AT&T unlimited-data customer what the FCC's historic fine against the company for misleading customers really means.
After a district court judge rejected a $324.5 million settlement in August, the tech firms are hoping the Ninth Circuit will intervene.
The company must now pay $450 million as part of a settlement, but it maintains it did nothing wrong.
A joint venture between Dixons Carphone and Sprint will expand the carrier's retail operation in the US.