What is the customer service number for suntrust mortgage? Suntrust Mortgage Customer Service Phone Number. The Customer Service Phone Number of Suntrust Mortgage is: 1-800-634-7928, 1-877-907-1017, 1-800-443-1032. SunTrust Banks provides the mortgage services to its clients.What is the customer service number for suntrust bank? Suntrust Bank Customer Service Phone Number. The Customer Service Phone Number of Suntrust Bank is: 1-800-568-3476, 1-866-299-4214.Can a bank call your mortgage loan? When banks call in a mortgage that is due, the term they often use is "acceleration.". This means that the balance of the loan becomes due immediately. While this could spell financial disaster to a borrower, it occurs only in rare or extreme cases.Can i close the suntrust bank account by phone? The SunTrust Bank website is set up for online and mobile app banking, so you can also check your options for closing the account through either access - but again, don't expect a banner headline inviting you to do so. Ask about closing your account through the Chat tool if you can't easily find any information.