can I roll back my ipad and i phone from the 9.2.1 latest update?

My iphone and pad will not connect to my home network after I updated.  It asks for the password and it wont accept it. other devices work on this router, just not my updated stuff.
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Chris WongCommented:
How To Downgrade iOS 9.2 And Restore iOS 9.1 On Your iPhone, iPad And iPod
Dirk MareSystems Engineer (Acting IT Manager)Commented:
Have you tried resetting network settings?

Reset ipad/iphone network settings..

even though this is an IOS6 article the menu structure has not changed for resetting..


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artismobileAuthor Commented:
Sorry for the late response. It was late where I was.  I'm resetting my network settings now
artismobileAuthor Commented:
Tried resetting the network settings on both. Did not work.  I'll try the roll back.
How do I find the ipad model?
artismobileAuthor Commented:
The reset of the network settings and after that the reboot of both the devices and my router in that combination worked.
Thanks, I'll split solution
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