After you've logged into the Mobile App, tap on the "More" menu option the bottom right corner.
After the More menu loads, scroll down and under "Credit & Debit Cards" tap the "Request Credit Card Limit Increase" menu option.
If you have more than one credit card, you will need to select the card you want the request to be for. Afterwards, provide the required employment, income, and housing information and then scroll down and tap the "Request Limit Increase" button.
Once your request has been submitted, you'll receive a notice that an EECU representative will be contacting your soon.