As BlackBerry begins rolling out its second BlackBerry 10 smartphone, the struggling vendor will at least have some good momentum to build on coming out of April. According to market watcher Net Applications, BlackBerry gained usage share in April after losing share in each of the two prior months. While BlackBerry only accounts for a minuscule portion of global mobile usage — 1.51% in April, less than Symbian’s 1.73% — it’s at least moving in the right direction, up from the low of 1.39% it hit in February. IOS shed about 1.5 points in April to fall to a still-dominant 59.04% according to Net Applications, while Android smartphones and tablets gained more than a point to climb to 26.02%.