Hi...I had the mycelium app on my phone. I gave someone the BTC address for my mycelium wallet and they sent me some BTC.
A few days later I deleted the app from by phone, but reinstalled it two days later. Same person then had to send me 0.07 BTC, and I told them the same address was fine, not even thinking about it may be different after reinstalling.
Is there any way to get this 0.07 BTC back? I know the address it went to, but I don't know how to access it. I really need this BTC

Gone baby Gone,bitcoin is no registration based while using a wallet apps,Private key is what you must keep secure
I have the private key QR code and 15 digit password from the original wallet...but am not sure how to access the BTC with it. According to what I read, as long as you have this and lose your phone you should be alright, so I imagine this would be the same process?
But when I reinstall the wallet, scan this QR code, and enter the password, it tells me my key doesn't match my BTC address (which is a new one bc I reinstalled the APP)