I know there are a few solutions for older iOS versions, but I can't find anything compatible w/ iOS 6 (tethered jailbreak) that will allow, for example, a beep every two or three minutes when I have voicemail waiting. I don't carry my phone on my body at work, and I move around a lot, so it's easy to miss calls. This is my first iPhone, coming over from a Treo650 that I've had since 2006. That phone had both audible alerts & a multi-color LED to indicate waiting messages. I'm amazed that the iphone doesn't have this...

Any help very much appreciated. This is something I've come to rely heavily on in a phone. I can install .ipa or .deb if anyone knows of something that's not on iTunes/Cydia, etc.