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iPhone 6s
16 GB
iOS 14.2
September 2021 factory reset and new battery installed by an Apple store tech.
Cannot update to the latest iOS - not enough memory unless I delete some apps.
Very slow performance. Takes several seconds to open apps and web pages. Battery drains very fast compared to my newer iPhone.
Suggestions?
iPhone 6s
Cannot update to the latest iOS - not enough memory
1.
You need about 6 GB device storage for the update, try to free up device storage, see this Apple articles below:
If you need more space for an update on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT203097
How to check the storage on your iPhone, iPad and iPod touch
https://support.apple.com/en-gb/HT201656
Clear Other storage on your iPhone or iPad
https://support.apple.com/en-us/HT211686
What's the difference between device storage and iCloud storage?
https://support.apple.com/en-us/HT206504
2.
Try to optimize the range of the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
3.
Check also the Wi-Fi network, see this Apple article: If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
https://support.apple.com/en-us/HT201435
4.
See also the following Apple articles:
Update your iPhone, iPad, or iPod touch
https://support.apple.com/en-in/HT204204
If your iPhone, iPad or iPod touch won’t update
Cannot update to the latest iOS - not enough memory
1.
You need about 6 GB device storage for the update, try to free up device storage, see this Apple articles below:
If you need more space for an update on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT203097
How to check the storage on your iPhone, iPad and iPod touch
https://support.apple.com/en-gb/HT201656
Clear Other storage on your iPhone or iPad
https://support.apple.com/en-us/HT211686
What's the difference between device storage and iCloud storage?
https://support.apple.com/en-us/HT206504
2.
Try to optimize the range of the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
3.
Check also the Wi-Fi network, see this Apple article: If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
https://support.apple.com/en-us/HT201435
4.
See also the following Apple articles:
Update your iPhone, iPad, or iPod touch
https://support.apple.com/en-in/HT204204
If your iPhone, iPad or iPod touch won’t update
Slow iPhone
