IOS – Head Mode/iPod Mode Not Working for iPhone 4S in iOS 6

If you already happy with your connection and the only main problem is the Not Charging part, I would strongly suggest that you contact the creators of your connector and ask for an upgrade as it is a simple power problem as the new iPhone 4 needs different Amps to charge correctly.

If you want a new connection, I know Dension is very good on this and integrates well with several brands of vehicles so you can use your radio to also see music details.

Unfortunately, This is not possible due to current App Store limitations unless someone else with a jail broken iPhone that you trust has a copy of it that you can grab. One problem with dealing with the Apple App Store is that older versions are forever lost due to Apple's App Store polices. We should be giving concerned feedback to Apple to address this issue too, not just the app developers. So it looks like your best option if you need to have the Mint app, is to read up on the latest jailbreak, and insure your jailbreak path, then update your iPhone to the latest iOS, and then re-jailbreak it. The good news is that there is a untethered jailbreak for both iOS 5 and iOS 5.0.1 for the iPhone 4 as referenced in my comment above.