New help for a fake phone and want change value of ram

hello

i have buy a phone MX4 g+
have this :
4GO ram but is fake seems have 512MO
MTK6592 faked is a mtk 6572
16GO rom faked 1.3GO rom

have many app crash when i use it , have try ram expander for check if the pb is ram , and yes when i use this soft , app working

i Want now change the value of ram , have search and seems is in kernel

i search but cant find what i do change

And if i can change the value of rom to 1.3Go

someone can help me please ?

some info :

KERNEL: Linux version 3.4.5 (root@zy-31-desktop) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP PREEMPT Sat Jun 6 16:39:13 CST 2015
CODENAME: REL
Mainboard: G+
BRAND: G+
CPU_ABI: armeabi-v7a
CPU_ABI2: armeabi
DEVICE: G+
DISPLAY: S5_JB3_3G_EMMC_32_4_XLD_QHD_Z16_G+_MX4_20150608.17 2215
FINGERPRINT: alps/yuanda72_wet_a_jb3/yuanda72_wet_a_jb3:4.4.3/JDQ39/1433582475:user/test-keys
HARDWARE: mt6572
ID: JDQ39
TAGS: test-keys





i have try kernel of jiake V5 that my phone was a clone apparently , booting but tactile dont work :(
for now i can post link for firmware and my extracted kernel :(

thanks by advance for help