How do i contact firstbank customer service? Contact FirstBank customer service by phone at 1-800-964-3444 or online, to find answers to all of your banking and lending questions, product support, and more.Where are the first bank branches in new jersey? Visit the NNJ region here! First Bank has branches in Cranbury, Ewing, Flemington, Hamilton, Lawrenceville, and Pennington. Visit the CNJ Region here! First Bank has branches in Doylestown, Trevose, Warminster, and West Chester in PA and Cinnaminson, Delanco, and Williamstown in Southern New Jersey.How do i contact fbfb banking? FB Banking Tip. FirstBank will never call, text or email customers unsolicited for personal information. If you receive a call, message or email and you’re unsure if it is FirstBank, do NOT release your information. Hang up and call us at (800) 413-4211 or visit us at your local branch.What is the firstbank help center? The FirstBank Help Center is your one stop guide to the answers to your questions about our products and services and numbers you need now. How do I contact Customer Service? How can I find a location closest to me?