First of all hi!
I have Samsung Galaxy Pocket (GT-s5300) and I have a bit problem with updating.
So my device says you have a new update:
Any help or at least response would be great.
If you are rooted, then OTA updates will not work for you. Download a full update from Samsung site and flash it via cable from BB.
download samsung kies and update it that way, otherwise if your willing to factory reset, download odin and the update firmware for your device and flash it that way.
are you sure you phone is original and not a chineese clone?
Try droid tools for MTK based phones to detect if it is MTK based