Need to update if available soft were it introduced.
How to enhance battery life spareness in my iPhone
iPhone 7 Plus, iOS 14
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RufaiGI Said:
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Q1. "Need to update if available soft were it introduced.:"
A1. Use my User Tip: Update your iPhone Using a Computer - User Tip
Q2. "How to enhance battery life spareness in my iPhone"
A2. Optimize the Battery: About Optimized Battery Charging on your iPhone - Apple Support