If you cancel wireless service before receiving 24 bill credits, credits stop and balance on required finance agreement is due (e.g., $174 – SyncUP Kids Watch). Tax on pre-credit price due at sale. Limited-time offer; subject to change. Qualifying credit, & service required. If you have cancelled wearable lines in past 90 days, you may need to reactivate them first. In stores & on customer service calls, $35 assisted or upgrade support charge may be required. $174 via bill credits; must be active and in good standing to receive credits; allow 2 bill cycles. Max 12 devices/account. May not be combinable with some offers or discounts. SyncUP Kids Watch: At participating locations. For most features, qualifying service, app, at least one separate voice line, & a compatible smartphone are required. To communicate with the device it must be turned on and in an area with coverage. Not intended for use outside US/CA/MX. $5/mo. more without AutoPay. Roaming: Roaming and on-network data allotments differ: includes 200 MB roaming. Partial megabytes rounded up. During congestion customers using >50GB/mo. may notice reduced speeds until next bill cycle due to data prioritization. See T-Mobile.com/OpenInternet for data management details. Unlimited talk & text features for direct communications between 2 people; others (e.g., conference & chat lines, etc.) may cost extra. Location information is approximate & may not always be available. Use as intended and only for lawful purposes. Intended to be used by a child and monitored by a parent or legal guardian; use as intended and only for lawful purposes. You agree T-Mobile can collect and use information from the device and app as described in our Privacy Policy. When you use T-Mobile service, you agree to our T-Mobile Terms and Conditions at T-Mobile.com (including arbitration provision), and your specific rate plan terms.