Hi, I did a little research and there are several H422 phones but we can't support any of them. They're all GSM and our LS740 that we're supporting is a CDMA device.
Apparently there are also two models, there's one that's essentially the Volt 2 as dvdavid888 said, but then your model uses a different processor, a Mediatek as opposed to a Qualcomm. There's more difficulty getting ROM support for Mediatek phones, but it's not impossible. It's a bit more generic at least, so you'll want to start by looking for what people have developed for the MT6582.
Good luck!