To cancel a port request with T-Mobile Porting Department, it is important to understand that the process can vary based on the specific situation and timing. Generally, if a port request is still in progress and has not been completed, one can initiate a cancellation by contacting T-Mobile directly for assistance. The T-Mobile Porting Department can provide specific guidance on how to proceed. If the port request has already been completed, it may not be possible to cancel it as the number has already been transferred. It is advisable to check the official T-Mobile website for the most up-to-date information on porting and cancellation processes. There, one can also find relevant contact details to reach out for personalized assistance if needed.