BlackBerry is slowly, but surely covering all its bases in an effort to turn BBM into a cross-platform messaging monster. The quest to return the standard-bearer to its former glory started with iOS and Android, but this summer it'll be coming to Windows Phones as well. According to the Canadian company, it will ship with all the same functionality as its counterparts on other OSes, including stickers and voice. More importantly though, BBM Groups (which allows you to chat with up to 50 people at once) and Channels will be included as BlackBerry works to fight off challenges from the likes of WhatsApp and Hangouts. Sadly those are all the details we have for now, but hopefully Waterloo will lock down a release date sooner, rather than later.