In iOS 9.1 and lower, go to Settings - General - Profiles - tap on your Profile - tap on Trust button.
In iOS 9.2+ & iOS 11+ go to: Settings - General - Profiles & Device Management - tap on your Profile - tap on Trust button.
In iOS 10+, go to: Settings - General - Device Management - tap on your Profile - tap on Trust button.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…