Download official KitKat firmware version 140616 for Rikomagic MK802IV first generation (RTL8188 version) from here, here or here. (S/N from 201305****to 201306****)
Firmware image file name: IV_8188-4.4_140616 - MK802IV_8188_20140614.img
Firmware image size: 513 MB
Firmware image file name: IV_8188-4.4_140616 - MK802IV_8188_20140614.img
Firmware image size: 513 MB
Boot version: 2.13
Firmware version: 4.4.02
Firmware version: 4.4.02
Notice
Pay attention, this firmware is only for RKM MK802IV with RTL8188 Wireless/BT chip (first generation), it is not intented for RKM MK802IV with Broadcom AP6210 Wireless/BT chip (second generation). You can install it on this if you really want, it will work just fine, except WiFi and Bluetooth connections.
A list with 16 firmwares for Rikomagic RKM MK802IV with RTL8188 Wireless/BT chip you'll find here.