In much the same way everyone love colonoscopies, we all love our cellphone carriers. With gouging, hidden fees, ridiculous charges for texting and more, companies like AT&T and Verizon inspire hate like few others. But hope is on the way, and all it takes (for now) is an iPhone, a little Wi-Fi and a simple $1 app. Line2 is an communication app modeled after the iPhone’s own phone software that, as the name suggests, adds a second line with its own phone number to your Apple smartphone. Well-suited to small businesses, the service by company Toktumi  also boasts features like Voicemail and…