As we all know,if we fix stuck in recovery mode issus by iTunes,it may cuase data erased.However,is it possible to fix iPhone stuck in recovery mode after iOS 10 upgrade without losing data?However,I recommend you shuld back up iPhone data when iPhone stuck in recovery mode after iOS 10 upgrade,and then get your iPhone out of recovery mode by restore your iPhone with iTunes:
Guide:Restore iPhone to get out of recovery mode with iTunes
Note:You shuld backup your iPhone data to comptuer at first
First of all,please update your iTunes to the latest version on your computer.
2. Use a USB cable to connect your iPhone to your computer.
Then press and hold the "Home" button and "Power" button at the same time for 10 seconds.
3. Then release the "Power" button and keeping holding the "Home" button for about 3-5 seconds, you will see a notice in iTunes like below.
4. The iTunes will detect your iPhone devices
5.Then restore your iPhone to get out of recovery mode with iTunes.
Note:Once it restore your iPhone,all data will be wiped,so you need to backup your data at first.
Tips:Do you want to directly get iPhone out of recovery mode without data loss?You can use a iOS system repair tool to directly fix iPhone stuck in recovery without data loss,here,you can learn this use guide to fix iPhone stuck in recovery mode after iOS 10 update.