TEXT MESSAGING FAQ Are the keywords case-sensitive? No. It doesn't matter whether you type "BAL" or "bal". What if I don’t get a response to a request? Make sure you're sending text messages to the 91489. Check the keyword and any other required information, such as the financial institution’s identifier, account nickname, and address. Why are my results sent as multiple messages? Text messages can't exceed 160 characters. If your account information goes over the limit, it's sent in multiple messages--no more than five at a time. I have text messaging enabled on my mobile device, so why can’t I get text messages? Your mobile service carrier may be blocking short codes, or you may have blocked short codes on your device. Short codes must be enabled to use F.N.B. Mobile Banking. Short codes are abbreviated phone numbers, usually five digits, used to send F.N.B. Mobile Banking messages.