You need to remove Find My on apple devices to return or sell your device as this causes the device to still be linked under your account and unusable without your details.

iPhone: Settings > Account > Find My > Turn off Find My

iPad: Settings > Account > Find My > Turn off Find My

MacOS 15 or later: Apple Menu > System Settings > iCloud > See All > Find My Mac > Turn Off

MacOS 14 Or earlier: Apple Menu > System Settings > iCloud > Find My Mac > Turn Off

iPhones can have issues with emails suddenly not working here are a couple of ways to fix this.

Re-enter password: Settings > Apps > Mail > select account > Re-enter password

remove and re-add: Settings > Apps > Mail > select account > Remove > Add new account > Sign in to email account. If nothing shows restart device.

If your printer is Wi-Fi enabled you can connect your printer to your home/office Wi-Fi. Once connected you can print via the share button on the document/photo you would like to print.

Connect Printer to Wi-Fi: Settings > Network > Wi-Fi > follow onscreen instructions.

Print from Phone/Tablet: Share > Print > Select Printer > ensure settings are correct > Print

If Print is not visable you may need to install the manufacturer app (hp print, epson, ect.)