Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to connect a pc to a phone [title] Locate your phone's usb cable. [step] This is the cable you'll usually use to charge the phone. [title] Make sure your phone and computer are on.

Ending1: [step] If your phone is not connected, consider switching one of your computers on. If this is not an option, you may want to backup your phone to an external usb port. Ending2: [title] Connect your computer's power supply. [step] Apple does not allow you to power up your phone without the proper power adapter. Ending3: [title] Plug in the small end of the cable. [step] This should go into your phone's charging port; usually, you can find this opening on the bottom of your phone. Ending4: [step] The bluetooth connection is the connection between the mobile phone and the computer connected wirelessly. [substeps] In order to pair an iphone and computer, you will need to connect the phone to a wireless connection.

Answer format: ending1/ending2/ending3/ending4