Nokia (NOK 0.29%), often considered an underdog in the smartphone space, has now made a potentially game-changing deal with China Mobile (CHL) to sell its flagship smartphone, the Lumia 920, on China Mobile's network. Although China Mobile is by far the largest telecom provider in the world, it won't necessarily provide Nokia with the largest high-end market, which is what the Lumia 920 addresses. But because the main high-end smartphone competitor, Apple (AAPL 0.48%), isn't on China Mobile, Nokia doesn't have much competition in that area. Motley Fool tech and telecom analyst Andrew Tonner thinks the tear Nokia stock is on at the moment still has room to continue.