How do I upgrade the version of Android on my tablet?

It depends on the tablet itself. In settings/about device there should be a 'check for updates' option, but that depends on the manufacturer. If you have a Nexus then you'll get updates pretty quickly, or if it's a mainstream tablet such as Asus, samsung etc., then there should be fairly regular updates. If it's a lesser known manufacturer then there may never be an update as a lot of these tablets are made within a strict budget and have no follow-up support, or may not even have the capacity to upgrade. There are ways round this, but it would probably require rooting and/or unlocking the bootloader, and may brick your tablet. What make/model is it?

Have you checked for update if updates are not available then you can always root your deivce.

Hey @Calvin, I'm not familiar with this device, but you could check in with the manufacturer's website (or your carrier if you have it on a plan) and see if or when there is a planned update. If there is none then your only option is, as @John mentioned, to flash a custom ROM on your tablet.

Kindly Follow these instruction:-

To flash HCL ME U1 tab first you need to download the firmware of the ME U1.The link for which will be provided below. Flashing of HCL ME U1 will delete all the previously installed apps that are on the internal memory of the tablet, also it will format the SD card so it recommend to take out the memory card.

The steps to Flash HCL ME U1 are as follows:

1) Download and extract the firmware files on laptop or computer. Download the firmware from here.

2) In the extracted folder click on the MPTOOL.exe file. A window will appear.

3) Connect the USB wire to the computer and switch off the tablet.

4) press the Vol + and power button together and then plug in the USB wire to the tablet as shown in the video.

5) If the step 4 is done correctly then a drive will popup on the system, this is the internal memory drive of the tablet and named VDfu.

6) On the appeared Window of MPTOOL a message will appear which says ” 1 Device Ready“. Only if above mentioned steps are done correctly, as shown in the image.

7) Now click on Update option on the MP TOOL window.

8) After the Android installation finish the tablet will restart of its own and you will be ready to use the tablet.

that is simple for doing that you need to root your device !!