If you've picked a BlackBerry Z10, opened up the web browser and found your default search engine set to Bing there is a good chance you're looking for a way to quickly change that. Unless of course, you like Bing. Getting it changed was quite honestly a bit of a task on BlackBerry 7 but with BlackBerry 10 it only takes a few seconds to accomplish:
That's it! You're all set with whatever search provider you choose and you'll never have to worry about it reverting back unless you wipe your device or reset it at some point.