Nothing - Phone (4a) Pro 256GB (Unlocked) - Pink

I use mint mobile on my service and works fine. Mint and metro are both T-Mobile so I don't see why not, just make sure the phone is network unlocked.

I just went in to settings/apps/Gemini and it allowed me to disable it.

No. This phone does not have a micro sd card slot. You can however buy a USB-C flash drive (or a USB-C to A adapter and use a USB-A flash drive) and use Android's "On the Go (OTG)" feature to expand storage of the phone.

You can check whether your phone will work with a provider by checking the compatibility on their website, you check your IME number (dial *#06#) to find it. The phone itself is unlocked but due to what it runs on it is only compatible with select few phone companies. I am using straight talks for mine but I know TMOBILE also works. Yes it has gps.

Yes it does! Although you need to first make sure that the carrier is compatible with your phone.