How to make CITYCALL I8550 run faster?

How to make data run faster on CITYCALL I8550?

Perform hard reset on CITYCALL I8550. However, this may only be a temporary solution as when you start using your device again you may stumble upon the same problems.
Try updating CITYCALL I8550 firmware. By doing that regularly you will make sure that CITYCALL I8550 performance is as good as possible.
Always monitor the internal memory space - too little of it may cause serious problems with CITYCALL I8550 performance.
Make sure that all your files such as photos and videos are on external memory (like an SD memory card)
Search for some applications on Google Play Store which may be useful to upgrade your CITYCALL I8550 performance (for example an antivirus app, startup manager, app cache cleaner).
Applications that you do not use should be uninstalled.
Try restarting the CITYCALL I8550.