How do I sign up all my FaceTime?

Hey there suiowe,

If you’ve already followed the steps under “Turn on FaceTime” from the article Use FaceTime with your iPhone or iPad, but it’s not working, the following steps can resolve the issue:

"Check your device settings

1. Make sure that you’re connected to a cellular data or Wi-Fi network. 
2. If you're using an iPhone, you need SMS messaging to activate your phone number with iMessage and FaceTime. Depending on your carrier, you might be charged for this SMS.
3. Go to Settings > General > Date & Time and make sure that your time zone is set correctly.

Turn off and restart iMessage and FaceTime

1. Go to Settings > Messages and turn off iMessage.
2. Go to Settings > FaceTime and turn off FaceTime.
3. Restart your device: iPhone
4. Turn iMessage and FaceTime back on."

You can read more here: 

If you can’t turn on or sign in to iMessage or FaceTime

Take care.