To reset your micro:bit to run the default program that came with it, download and flash this .hex file via USB. If you are unsure on how to do this, follow our article on How to transfer code onto the micro:bit via USB. The .hex file is also attached to this article.
If you use this .hex file and wish to use bluetooth services on iOS 10 or later, you will need to re-flash the BBC micro:bit via to enable pairing.
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