Temporary Port Out PINs are valid for 7 days and will work for all lines on the account. After 7 days, a new PIN will need to be requested. Customers unable to generate a Temporary Port-Out PIN via My T-Mobile or by using the Grand Central template, should contact Customer Care. Mobile Experts can also contact the RSL and choose (NTC) for assistance if needed. Note: Only the Billing Responsible Party (BRP) can request a Temporary Port-Out PIN over the phone.