Q: не могу активировать телефон после обновления

Больше детали пожалуйста.

Try to reset your device and activate one more time. This won't delete your data stored on this device.

• Press and hold the Sleep/Wake button
• Press and hold on the Home button
• Keep holding both buttons until the display turns off and back on with Apple logo on it.

If it does not help check these articles and follow the instructions.

If you forgot your Apple ID  - Apple Support

If you forgot your Apple ID password  - Apple Support

https://iforgot.apple.com/appleid

If these steps don't work, contact Apple and ask for help.

https://www.apple.com/support/iphone/contact