Upgrading a S2 from 2.3.5 to an up to date firmware

[Quza]

I recently discovered that my friends' S2 still runs on 2.3.4 and told him to upgrade his firmware, but Kies (2.6) doesn't recognize the device and the OTA updates only brought him up one version (2.3.5 now...). Is there an easy way to upgrade the phone to 4.x in one in a single blow?

 

[maniknarang]

I recently discovered that my friends' S2 still runs on 2.3.4 and told him to upgrade his firmware, but Kies (2.6) doesn't recognize the device and the OTA updates only brought him up one version (2.3.5 now...). Is there an easy way to upgrade the phone to 4.x in one in a single blow?

Hi,
If your friend's S2 is GT-I9100, then you can easily update his phone to the latest official firmware from Samsung.
Head on to this link, which covers everything from installing drivers to flashing the firmware: http://www.ibtimes.co.uk/samsung-galaxys2-i9100-unroot-official-jellybean-firmware-460777

All the best,
Regards.