this is my kernel configuration :
# minimum frequency to use
MINFREQ=125
# maximum frequency to use
MAXFREQ=1150
# list of frequency configurations: each "frequency:volt,dsprate"
FREQS="0:30,90 125:12,90 250:25,180 500:40,360 550:54,400 600:60,430 720:60,520 805:60,600 850:60,600 900:60,600 950:60,600 1000:60,600 1100:72,600 1150:72,600"
SMARTREFLEX_VDD1=0
SMARTREFLEX_VDD2=1
GOVERNOR=ondemand
UP_THRESHOLD=95
SAMPLING_RATE=300000
IGNORE_NICE_LOAD=1
POWERSAVE_BIAS=0

fells like new phone , the downside :the battery goes faster , use of messenger(wi-fi) +some photos +some calls , 2 days isn't bad