Verizon is lining up to use IMS for its 4G voice solution, but an alternative spec coming out of the VoLGA Forum -- which counts Deutsche Telekom, HTC, Samsung, and LG among its members -- is shaping up with a revised version this week that includes some intriguing new features. Some of the line items are bare-bones basics that'll be required of any successful next-gen spec, notably the addition of SIM-less emergency calling like you can do on a GSM handset today, but what caught our eye is a mention of "the use of VoLGA over HSPA." Presumably, this means that carriers that already have 3G services widely deployed today will be able to run voice using the same protocol for both their HSPA and LTE networks, simplifying infrastructure in the long term. It's still pretty crazy to us that voice over LTE isn't a unified, cut-and-dried standard that was squared away years ago -- but if anything, it just serves as a stark reminder for how important data has become in our mobile devices. Follow the break for the press release.