Activate my iPhone

Sorry about that.

As already suggested, please use this link (click on words written in blue) to contact Apple Support directly:

If you continue to see either of the alerts above, take your iPhone or iPad to an Apple Authorized Service Provider or make a Genius Bar reservation at an Apple Store to set up a repair

Regards

Giulio

See this support article:--> If you see an Update Failed or Apple Pay Not Available alert after iOS update or restart - Apple Support

If the issue persists, use the link provided in the last paragraph of the above article.

Regards

Giulio