T-Mobile at Costco
(909) 791-7422
16505 Sierra Lakes Pkwy, Fontana, California, 92336
Business hours
| Monday | 10:00am to 8:00pm |
| Tuesday | 10:00am to 8:00pm |
| Wednesday | 10:00am to 8:00pm |
| Thursday | 10:00am to 8:00pm |
| Friday | 10:00am to 8:00pm |
| Saturday | 10:00am to 6:00pm |
| Sunday | 10:00am to 6:00pm |
About us
Located inside Costco Wholesale, Experience the power of T-Mobile’s 5G network by switching to T-Mobile. Staffed by experienced T-Mobile employees, we offer exclusive benefits for Costco members. Membership Required.