How to speed up china iphone?how to reroot?

There are many reasons that your iPhone gets slow. For example:

1. One of the main reasons for iPhone running slow is the lack of updates.

2. Maybe your storage space is clogged up by some bloatware, and too many junk files.

3. If there are too many background apps, your iPhone will slow down other activities to keep the normal running of apps in the background.

4. When the network connection of your iPhone is poor, your iPhone will also get slow performance.

5. Under extreme weather conditions, iPhone running slow issue can also occur.

6. Deteriorating iPhone battery and simple aging processes can slow down your iPhone performance as well.

7. Poor and unreasonable settings of your iPhone, like motion and brightness displays, is also a common reason for slow running iPhone.

8. Malware is also likely to cause iPhone running slow issue, especially when you have a jailbreak on your iPhone.

If you want to improve the speed of your iPhone, read on this tutorial: How to Fix iPhone Running Slow?

You can follow some tips below to speed up your iPhone:
1. Clean up Cache or trash before backup, actually, it will free up more space on your iPhone.
2. Update your iPhone to the latest iOS version, because Apple will optimize the old iPhone performance in new system.
3. Embrace HEIF. Go to "Settings > Camera > Formats", and choose High Efficiency to make photos smaller.
4. Tick off auto updates. Go to "Settings > iTunes & App Store" and tap the toggle to turn off "Updates" in the Automatic Downloads section.
5. Tick off background app refresh. Go to "Settings > General > Background App Refresh" and tap the toggle to switch off.
6. Reduce transparency and motion effects. Head to "Settings > General > Accessibility > Reduce Motion" and turn it on.
7. Restore your iPhone. But make sure you have a backup before doing that. If you think the process is slow, you can read on this tutorial to make it faster.
8. The ultimate solution. Change a new iPhone, the latest, absolutely. Hope your iPhone can get back to normal soon.

If your phone is iPhone,suggest you can use Tenorshare iPhone care pro to speed up iPhone.
iPhone Care Pro