FirstMobile App is one of the best mobile application for all your transfers, paying of bills and buying of airtimes for all networks. It is free to download on all Android phones, Blackberry 10 Smartphones and Apple phones. If you are a First Bank customer, u need to download the App if u don't have it. It is very useful and convenient. If you aren't a FirstBank Customer, u need to open an account in any nearest branch close to you to enjoy it's benefits.
6 Simple and Easy Steps in Setting up First Mobile App
1) Download and install the app from your app store.
2) Open and click Register.
3) Input ATM Card details, Card number and Card Pin and then click next.
4) You will receive a One Time Password (OTP) 5 digits, on your registered phone number.
5) Input your OTP and MPin(5 digits of your choice for log-in) then click next
6) Enter two security questions and answers and transaction pin(4 digits be used in authenticating transaction) and input (TN020062) as Referral Code and then click, Save.

That's it. Very simple and easy to use.

What happens when I make a transaction I am deducted and the account is not credited.

@dkdigits, Sorry for the late response. Have u gotten a reversal if u haven't, then go to any nearest first bank branch and complain. Thanks