Some providers allow you to use a USSD code to add credit or check how much data or minutes you have. The result would be a status message. Before coming to Koodo I used SpeakOut prepaid - they had different codes to check minutes, data, prepaid cash balances, etc. This would be especially useful on prepaid since there's no prepaid self-serve app and no mobile website. Yes, I know you can call *611 but then you have to listen to the voice prompts to get the information you need.