How can i update my ios

You will need to upgrade your phone in order to update your OS. The phone you have simply does not have the hardware capable of running a newer iOS version. It has always been the case the software out paces hardware and there is no reason while that will not continue. The good news is, you can also get a device with more storage as well as improve your battery life. That solves all of the problems.

yangbarajas wrote: "...and inprove the battery life"

yangbarajas ~ Does your iPhone 7 Plus still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

õ¿õ¬