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# How to Update the Dejavoo QDs

In the home screen you will see different apps please ensure to access DVPaylite
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdba5fb0_8egqz4.png)

You should see "Listening for transaction"
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdbd15b7_ygmyfw.png)

Click the Star Icon
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdcd61b7_18mf6st.png)

Click Upgrade App
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdce3071_1u5itmb.png)

Enter the Last 4 digits of the TPN# you see on the screen of your credit card machine and Hit OK (the image is only a test TPN#)
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdcf2754_a317hi.png)

Click Download APP (1) first and then once it's done Click Download Parameter (2)
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdd2ee6e_v54kdx.png)

Once it's successfully done you will see the success message
![](https://storage.crisp.chat/users/helpdesk/website/6989aace46840400/snagdd3d081_1r0n3xr.png)

**# The device should be back to Listening for Transaction automatically and then you can start processing a credit card using your coreSTORE point of sale**

||| ***Additional Note:***

- If the Dejavoo QDs is prompting for any system password it should be 336686 by Default. 

- if you only want to see the TPN# click the person icon next to the star icon and you will see the serial number and tpn# on the screen