It’s a little tricky to setup an email signature with an image on iPhone or iPad. If you simply copy and paste a signature, the image will work at first but after some time, it will become missing and will just show up as a blank box instead of your image in your html email signature.

Here is the solution that worked for me. Hope it helps you.

Prepare the HTML signature. (Part 1 of 2)

1. Upload your logo on the internet somewhere. You can upload it to your web server, google drive, dropbox, etc. As long as you can have a public link to it.
2. Download my Sample HTML email signature with image for iPhone/iPad (right click on the link, save file)
3. Open it with a simple text editor(not browser or word). (notepad for PC, or ATOM for MAC)
4. Edit the signature, change the url of the image to the public url of the image that you’ve uploaded in step 1
5. Edit your contact information here so you don’t have to do it later on your iPhone/iPad
6. Save the .html file and email it to yourself.

Here is the How-to video showing you step-by-step on how to create your own html signature to be used on your iphone/ipad

How to setup email signature with an image on your iPhone. (Part 2 of 2)

1. On your iPhone open the email that contains the email-signature.html
2. Tap on the html file to open it
3. Press and hold anywhere on the screen
4. Then choose Copy
5. Press the home screen
6. Go to Settings
7. Scroll down and choose “Mail, Contacts, Calendars”
8. Then Scroll down and tap on Signature
9. Delete your current email signature
10. Press and hold till you get a menu
11. Choose paste
12. This is very important step: Make sure to shake your phone from side to side
13. Choose undo (This removes the extra spacing and formatting that the iPhone automatically adds to your signature.
14. Tap anywhere on the white space to unselect
15. Now edit the signature with your information (if you html file doesn’t have your contact info)
    1. (make sure to completely remove the default phone numbers and type them in again to make sure that the numbers are not blue.
16. Tap the Back Button.
17. Now to Mail and create a new email
18. Your email signature with an image will automatically show up on the bottom of your emails on your iphone.

Here is the How-To video that shows you how to setup html signature on your iPhone/iPad