I bought a 25 dollars top up I enter the pin number but I can use my phone

[Jackhyf63]

Maybe the retailers are slow to update transactions to allow the voucher to be valid.  

[ShawnC13]

Need a bit more info?  Is the $25 showing in Available Funds or not showing on the account at all.  What is your current plan is it expired.  The more detail you give us the more likely we are able to assist you.