Thank you for the back up solution !

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Thank you Jager23 have ascended the solution at the right place !

change build

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replace :

wifi.supplicant_scan_interval=60 => wifi.supplicant_scan_interval=120 ( given original stock )


addition :

windowsmgr.max_events_per_sec=150 ( Max for 1 core )


and I forgot to replace the lot !

# Data settings
ro.ril.gprsclass=12
ro.ril.hsdpa.category=10
ro.ril.hsupa.category=7
ro.ril.hsxpa=3

replace all lines by

# Data settings
ro.ril.hsxpa=2
ro.ril.gprsclass=10
ro.ril.hep=1
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=10
ro.ril.enable.a53=1
ro.ril.enable.3g.prefix=1
ro.ril.htcmaskw1.bitmask=4294967295
ro.ril.htcmaskw1=14449
ro.ril.hsupa.category=5

the signal will be improved