Unable to set up Flex

[Barbiegirl_44]

Since IOS11 came and the two updates to the Fitbit app, I’ve not been able to sync my Flex. I’ve reinstalled the app multiple times. I’ve reset the Flex more than once. Have also rebooted my phone a number of times. I also disconnected the Flex from the app altogether and now i cannot reset it up. It is simply not being found by the Bluetooth. 

[SunsetRunner]

Sorry you're having problems, @Barbiegirl_44. Evidently you are not alone since Apple went to IOS 11.  Here are two screen shots from iDrop News that may help. 

https://www.idropnews.com/ios-11/how-to-fix-9-common-problems-caused-by-ios-11/50683/8/

[bRadJNei · Accepted solution]

Like another user: I found that closing the app and performing a hard reboot of my iPhone got the sync to work again.