How to update my iphone without WiFi or computer

zakaria284 Said:

"How to update my iphone without WiFi or computer"

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Use of Cellular to Update:

Aside from WiFi or a Computer, your only other option is to use Cellular. But, that is not an option for the model you have provided: iPhone 6s.

See my User Tips:

• Update your iPhone Using a Computer - User Tip
• Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User Tip

zakaria284 Said:

"Why is it that iphone battery don’t last"

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Troubleshooting iPhone Power Drain:

A. View the Battery Health:

Apple recommends you get a new battery when the Battery Health reaches 80% or lower. So, you you might be all set for now. It's all just a guestimation on Apple's part - all batteries are different.

1. Go To: Settings
2. Tap: Battery
3. Tap: Battery Health
4. View: Percentage.
5. Is it 80% or less?

B. Troubleshooting the Battery:

• iPhone Battery and Performance - Apple Support

• Charge and Monitor the iPhone Battery - Apple Support

• About the Battery Usage on your iPhone - Apple Support

• About Optimized Battery Charging on your iPhone - Apple Support

• If you see "Your iPhone Battery may Need to be Serviced" - Apple Support

• Use Low Power Mode to Save Battery Life on your iPhone - Apple Support

You can’t. You need a WiFi connection or a computer connection.

For your battery, what is the battery health level?