[Q]SamsungGalaxyS4i9500Clone;Cantboot2Fastboot!onlySt ockRecovery topic

Hi!
Im new in XDA bt i still knw the system basics on cracking.
bt nw im facing a problem with a clone phone of my sister's. I got the ADB drivers installed in my pc bt i cannot unlock bootloader since booting to fastboot is not working! i tried all the shortcut methods like the volume keys and home keys bt all failed. all i can do is i can boot in to the android system recovery in the phone using cmd (adb reboot recovery) .
i evn used many other softwares like the MTK Droid Tools and Evn many developments tool kits too.
pls do help me t at least root it. i m in need of installing CM 9 or 11 since its OS system is fully weak in function.

Specs:
Samsung Galaxy S4 {(Made in Vietnam)+i dnt believe it!}
Model No. : GT-I9500
Android Version(OS): Android 4.2.2 JellyBean
Baseband: I9500XXUAMDE
Kernel Version: 3.4.5-447903
Software Version: JDQ39.I9500ZSUAMDF
Hardware Version: 1.1.0
RAM: apprx 700MB