Sir, it depends if your device supports the latest android version. Need to check muna. Then kung capable naman siya para maupgrade up to Lollipop or Marshmallow just follow this easu steps:
1. Tap the “Settings” on your device.
2. Change “Auto update apps over wifi enabled”
3. Go to “About” >> “About device”.
4. See to “Software Update”.
5. Tap on “Check updates” and wait for the form to search for available updates.
6. If your mobile device supports the latest android version you can see it at this page.
7. Check that you have enough memory on your mobile
8. Download and install update to Lollipop or Marshmallow 6.0.
By using wifi, you can manually upgrade android version online with nobody’s help.
Make sure your device have enough battery to complete the upgrade.
Good luck.