My iPhone 6s stuck on software update and later quite

Hello agbango,

Thank you for taking the time to post your question to Apple Support Communities. We understand that you're experiencing issues with updating your iPhone.

To confirm, are you updating your device via Wi-Fi, or using a computer?

If you're updating from Settings > General > Software update, check out this support article for steps that can help: If your iPhone, iPad or iPod touch won’t update

If you're receiving an error on a computer when attempting to update, see If you see an error in Finder or iTunes on your computer

Let us know if this helps.

Cheers!