Unable to connect my new iPhone with the old iPhone.

To use Quick Start your old phone must be running iOS 11 or later and you need to make sure it has Bluetooth turned on. If those conditions have been met, then once you bring the devices close together, you should have the option to set up WiFi and continue with the setup.

If you do not have a SIM card in the phone, you may find that you are unable to set it up. Are you trying to set the phone up without a SIM card?

bliwon wrote:

So basically im sure i have a sim card on this current phone (aka the previous phone) but up until today it says sos and that my sim is not supported? Idk whats happening

That is happening because the phone is locked to a cellular carrier. It is likely that your new phone will not accept any cellular service other than from the cellular company that it is locked to. The person you received the phone from should contact their cellular provider to confirm that the obligations have been met and if they have they can request to have it unlocked. That is something that would be very difficult for you to do since you may not know the provider that it is locked to and even if you did, they would not provide you with any details about the phone for privacy reasons.

Here is the support article that deals with unlocking the phone from your carrier, but the instructions are specific on it being your phone and your carrier that it is locked to. Attempting to remove the carrier lock without any help from the previous owner of the phone will likely not be possible.

How to unlock your iPhone for use with a different carrier - Apple Support

Please reveal which iPhones you are referring to and which iOS version is installed on the old iPhone.

Axel F.