When the First Bank app refuses to open, the cause is almost always simple: an outdated version, corrupt cache, permissions, network hiccup or a bank-side maintenance window. Work through these fixes in order.
1. Update and Restart
Open the app store, check for the latest First Bank app update, then fully restart your phone. Bank apps break often after OS or app updates.
2. Clear Cache and Data
Go to Settings → Apps → First Bank (or FirstMobile) → Clear cache, then try. If it still fails, clear storage (you will re-login, but nothing is lost server-side).
3. Check Network and VPN
Switch between Wi-Fi and mobile data, and disable VPNs that can trip bank security checks.
4. Check Server Status
First Bank performs periodic maintenance. Check their official page/social channels or call customer care to confirm there is no outage before reinstalling.
5. Reinstall and Grant Permissions
Uninstall, reinstall from the official store, and accept SMS/notification prompts — some features silently fail without permissions.
FAQ
Does the First Bank app have scheduled maintenance?
Banks do regular maintenance; official channels announce closures usually in advance.
Will clearing the app data log me out?
Yes, you will sign in again, but your account and balance are unaffected.
Related: Access Bank App Not Working and EcoBank App Not Working.