I have iphone 4s ios 9.2.1 cannot play my favourite game mobile legends because it lagging and hang what i can do to play mobile legend

seeing that an iPhone 4s is an older phone its very natural for the phone to be slowing down on some mobile apps. There are a few things you can do to help your performance though

1. Close any other application running
2. Restart your phone
3. Kill automatic background processes

Tap Settings > General > Background App Refresh and turn Background App Refresh off.

4.You can turn down graphics

Tap on Settings > General > Accessibility > Reduce Motion and set Reduce Motion to On.

These are your best option if you don't see yourself upgrading to a newer iPhone any time soon

1. make sure you have at least 4 GB free space.

2. update iOS to 9.3.5

3. buy a newer iPhone.