This is the second build of Minecraft PE 0.16.0, also known as 0.15.90.1. This is just a bug fix. If your Minecraft PE just crashes when you start it up, then read this next part.
Backup your com.mojang folder. Delete the original folder. Start up Minecraft PE. Then, replace the new com.mojang folder with the backup one. Then, delete, rename or move the resource_packs folder. It should now work. The resource_packs breaks the Minecraft PE 0.16.0 beta.
Backup your com.mojang folder. Delete the original folder. Start up Minecraft PE. Then, replace the new com.mojang folder with the backup one. Then, delete, rename or move the resource_packs folder. It should now work. The resource_packs breaks the Minecraft PE 0.16.0 beta.