How to Add Custom Email Signature to Apple iPhone or iPad

If you have a custom email signature in Gmail or Apple Mail, you'll also want to set it up on your mobile devices. Here's how.

1. Send yourself an email from the account with the custom email signature
2. Open that email on your iPhone or iPad
3. Select the entire email signature
4. Open Settings > Mail
5. Scroll down and select 'Signature'
6. If you have more than one email account, this should be set to 'Per Account'
7. Select the box for the appropriate email, tap, hold, then hit 'Paste'
8. Physically shake your phone (yes, really)
9. Tap 'Undo' (to restore custom formatting)

That's it. Send an email from that specific account and it will now display your custom signature. If you make any changes to the original signature, you'll have to repeat this process.