Why nrf52 is not visible on discovering bluetooth devices?

[Kiryl]

I updated new firmware on nrf52. After that nrf52 was still visible "nrf Toolbox" Android app. It seems I didn't do anything wrong but when next time turned on nrf52 and scanned it then it wasn't found. I tried many times to scan again. How to make it visible again on scanning?
Thank you.

[Madan]

i am also facing same problem if u found any solution please let me know

[endnode]

Always file new thread (because believe or not chance that your problem has the same root cause as Kiryl's is low). Also provide some reasonable information, both you and Kiryl said basically nothing. (if there should be response equally shitty as your bug report it would be "have you turned it off and on again?"). Actually 99% of problems here don't really get resolve by someone's answer but just by better debugging on the originator's side. So file new question where you describe in detail what HW you have, what FW you have, where/how you get it, how you load it there, how it behaves, what additional steps you do, what you expect to happen and what happened instead. And there is good chance that while writing down all these information you will also find where you are doing mistake (or start reading about the steps you don't understand right now). Truth is out there;)