No, Sprint does not support the GizmoWatch.

Can GizmoWatch work on tmobile?

Is the GizmoWatch compatible with T-Mobile? No, the GizmoWatch by Verizon is not compatible with T-Mobile. Does T-Mobile support the VTech Kidizoom Smartwatch DX2? No, the VTech Kidizoom Smartwatch DX2 is not supported by T-Mobile.

Does tmobile have something similar to gizmo?

The Timex FamilyConnect™ mobile app offers parents a way to monitor the watch and communicate with their kid with a fun device their children will love.