Cannot reactivate iPad after updating to ios9.3
I cannot reactivate my ipad2 after updating to ios9.3
iPad 2, iOS 9.3, cannot reactivate iPad
I cannot reactivate my ipad2 after updating to ios9.3
iPad 2, iOS 9.3, cannot reactivate iPad
Are you sure your using the same apple id and password? Does it display an error message?
The update should have taken you to 9.3.1 as there was an issue with 9.3 for the iPad 2. See here for instructions:
If you can’t activate your iPad 2 (GSM model) after you update to iOS 9.3 - Apple Support
Cannot reactivate iPad after updating to ios9.3