How do i update my prototype Lumia 820 ?

[amit CHOPRA1]

Hello Guys ,

I have a unlocked prototype Nokia Lumia 820 (specifications below) .
Tried to update it after flashing and Nokia Installer for Retail . Din't work .
Spoke to Nokia care executive , he says my device a prototype from Finland but in extras+info it shows Manufacturer name : RM-826_im_india_201 .
The Nokia Support page says Amber and Black updates are available in Finland but i haven't received any OTA updates nor am i able to update manually .

Please suggest any alternates as i am quite happy with my phone and don't want to change it .

Current Specifications:

OS Version : 8.0.10211.204
Firmware Revision : 1232.5901.1248.1001

I'm stuck on Portico . Please help .

 

[LTTG]

Try Nokia Care Suite and NaviFirm+

 

[alexloe]

What's your product code?

059xxxx

 

[amit CHOPRA1]

I tried Nokia Software Updater for Retail but it still din't show any updates .
Can you please link me to Nokia Care Suite or any blog which can help me with that .

 

[LTTG]

**PLEASE NOTE: I'M NOT RESPONSIBLE FOR ANY DAMAGES THAT MAY HAPPEN TO YOUR PHONE, PLEASE FULLY CHARGE YOUR PHONE AND FLASH IT WITH YOUR OWN RISK**

You should find the full tutorial here: [How To] Download and flash all WP8 Nokia Lumia Stock ROM - xda-developers but use this product code 059R081 (because you have an 820)