TRICK TO UPDATE AND USE NETQIN ANTIVIRUS v5.6.6 FOR FREE.

1. First install NetQin Mobile Security Pro v5.00(62) and then overwrite it with NetQin Mobile Security v5.06(6) 

2. After that navigate to messaging app of your phone and open settings and change the "Message Center Number". For instance, if the message center number is "+112519012345", change it to "00" and save it. 

3. Now start the application and in options go to "UPDATE". It will pop a meassage like "Your virus definition has expired, update to the latest virus definition: XXXXXXX for 200 Qin Coins". Select "Yes" to supplement 200 Qin Coins, this will cost you XXXX .... etc etc etc ...." Simply click on OK (don't worry, no charges will be deducted because the application sends a message to deduct the balance and we have already changed the message center number so as the message is never delivered and in the meantime the antivirus is updated).

4. BINGO !!! The application is now up-to-date without you buying the software. Now you can navigate to to the messaging app and in the "outbox" you can find a message "delete it" and finally reset your messaging center number to default. 

5. Now every-time you want to update the software just follow the above steps and get up to date. Netqin Antivirus v5.0 Protection for free and that too for LIFE!