FAQ's (These may be helpful AFTER installation): https://dynasend.com/pages/email-signature-user-faqs.html

EMAIL SIGNATURE INSTALLATION INSTRUCTIONS - iPhone & iPad (Requires iOS6 or higher)


Step 1 - If you don't currently have your signature open in a browser tab, display it now:

  

After entering your email address and clicking the button you should see your signature displayed in Safari as shown below.
iPhone / iPad email signature installation - image 2

Step 2 - Copy Your Signature to Your Clipboard

Zoom out to see the whole signature. Hold your finger on any block of text (not an image or picture) until the block of text is highlighted with four blue dots.

Note: Some signature designs do not contain any text that will allow this. In this case we will provide some temporary text beneath the signature. You may use this to execute the copy process. You can then delete the temporary text once the signature is installed into your email program. If you are not finding any text you may use to perform this copy function, please return to form where you created your signature and look near the bottom of the form for an option to turn on this temporary text.
iPhone / iPad email signature installation - image 3
Drag the blue dot (as shown) all the way to the top of the screen. Always move upwards. No matter where you start, a complete drag to the top will highlight the entire page as needed.
iPhone / iPad email signature installation - image 4
The whole screen will now be blue, with a "Copy" prompt in view. Tap "Copy" and your signature will be copied to your clipboard.
iPhone / iPad email signature installation - image 5

Step 3 - Install Your Signature

Begin by going to "Settings"
iPhone / iPad email signature installation - image 6
In Settings, scroll down to "Mail, Contacts, Calendars"
iPhone / iPad email signature installation - image 7
Next, scroll down to "Signature" then tap to open the Signature window.
iPhone / iPad email signature installation - image 8
Note: If you have more than one email account set up you will see the number of accounts to the right of "signature" - 2 in this case.
iPhone / iPad email signature installation - image sub1
If you have multiple accounts, you need to select "Per Account" so that you can apply the new signature to your business email account only.
iPhone / iPad email signature installation - image sub2
Hold your finger in the white edit window until the "Paste" prompt appears. Tap the "Paste" prompt.
iPhone / iPad email signature installation - image 9
Your signature will appear in the Signature window but the formatting of the text will be goofed up. GIVE YOUR PHONE A GOOD SHAKE. This will cause the option to "Undo Change Attributes" to appear - click it and the font formatting will be restored to the proper styling for the signature.
iPhone / iPad email signature installation - image 10.5
Your signature will appear, properly formatted, in the Signature window. (If the temporary text was used at the bottom of your signature to help you copy it, now is the time to delete it.) Tap out of Settings. Your signature will be saved automatically.
iPhone / iPad email signature installation - image 10

Step 4 - Use Your Signature

Your email signature will now automatically appear when you go to compose or reply to a message.
iPhone / iPad email signature installation - image 11
Note: Hyperlinks in email never work while you are composing or responding to a message.  To test your links, compose a message to yourself, and try the links when you have received it and are reading it.