T-Mobile Campus, Bldg 1
3617 131st Ave SE
Bellevue, WA 98006
T-Mobile Campus, Bldg 1, 3617 131st Ave SE, Bellevue, WA 98006 From I-90 Eastbound, take Factoria/Richards Rd, exit after the I-405 exits. Continue straight on SE 36th Street, take 1st right onto 131st Ave. SE (between buildings). Bldg 1 is by the giant magenta T! Visitor spots are before the gate. Meet us at the double doors under the portico.