What makes you think they are partnering with an existing cell phone company? I'm pretty sure they are clear on their position as an emerging cell phone brand themselves. One shouldn't ask what cell phone company they could partner with, rather what carrier they will link up to. They are their own brand now.
Need to focus on what manufacturer they are using. Could be Mediatek as I've said all along. I know for a fact it is not Qualcomm.
Those are lower end phones than I'd expect, and I'm not saying "that's the partner," but the business model is to offer "first phones" with less bells and whistles, less costly, get people a phone in their hand that will one day become a necessity just as it has here. There's profit to this, but it'll take a little time to get it rolling, and it is unlikely to make everyone billions (more likely to be bought and assimilated by a bigger player if it shows promise).
Of course, I'm speculating, too, but it is on the CEO's suggested business analogy.
Or we can continue to speculate on instant billions while watching the stock PPS get tossed around by $300 trades every day.