You can always download Sony Ericsson Update Service (SEUS) and update it yourself.
It's very easy and you just have to follow it step by step then you should be able to have the latest R1EA037 firmware

AP set I assume ?
If so, it should be your CDA number incompatible with APAC region firmware CDA number.
To have yourself enjoy update from SEUS in future, you can try to flash your firmware to the latest R1EA037 with APAC region CDA number.

AP set = oversea set (most of them)
It comes with oversea firmware which the firmware CDA number is follow by region so the set bring to Malaysia, update at APAC region, it won't get up to date as the CDA number is incompatible

A reflash is needed to have your phone enjoy SEUS update in future

You can actually do it yourself. Save the RM 50 up

ISO or ASA in the most basic terms is the speed with which your film or digital camera responds to light, so the higher the ISO/ASA rating the more sensitive the film or CCD/CMOS sensor is to light.

As I go through some of the forum, K850i can't modify yet so you can't change the CDA number yourself. The easiest way is to pay for a reflash