(Telecompaper) BlackBerry is bringing new features, including stickers, to BBM, after expanding the messaging service to other mobile operating systems. The latest update of BBM is available from 01 April on the Android, iOS and BlackBerry app stores. The new stickers - larger, bolder and more expressive images than emoticons - can be added to BBM chats. Customers will be able to purchase and download sticker packs from the new BBM Shop found in BBM. Each sticker pack contains between 20 and 25 stickers and features content developed by artists or relating to a theme or a character like CosCat, Gilbert's Tales or Bubble Bot, as well as sticker packs featuring content from popular brands including Shaun the Sheep and WWE. To start, sticker packs will either be offered free or cost USD 1.99 (or the equivalent amount in local currency) and will be billed through the device's app store. A free sticker pack created by BlackBerry featuring favorite BBM emoticons will be available to all customers who download the new update. BlackBerry plans to add new sticker packs on a regular basis. In addition to stickers, BBM customers can now share photos in multi-person chats. Photos will be delivered in the chat as a thumbnail that can be opened to reveal the image in full size. BBM customers can also now send bigger in-chat files of up to 16MB, an increase of 10MB.