How long do Tmobile and UPS investigations take typically for lost packages?

Long story short, UPS seems to have lost my package after attempting delivery once. UPS 5 days later told me on the call that most likely lost and to file a claim to start the investigation (eg asking the driver). I told tmobile this and they said they will start the investigation with ups and get back to me with the findings. Questions - How long does it typically take in your experience? - Will Tmobile replace and order new phones without cancelling my order so my promos stay in tact like yearly upgrade? PS: the person on Tmobile app told me they can cancel my order and I can go to a Tmobile store and order. But then I would lose the special promos lol I told them I told them no I want to to keep my order and to wait for the investigation.