Trust
Can I change my certificates of confidence in the device?
With the limited information that you have provided, It is hard to even guess the problems faced by you.
You may get better and prompt responses if you may kindly provide the iPhone Model that you have and the iOS version if it is known to you and re-post.
Writing an effective Apple Support Commun… - Apple ... can fetch you answers to your bickering issues and offer you troubleshooting tips and solutions which may enable you to enjoy your iOS devices.