如果你的ROM沒有做任何關於訊號方面的優化的話
用RE管理器再system/build.porp新增以下文字("有用S PACK也不行新增")
#danny Tweak
power.saving.mode=1
persist.sys.purgeable_assets=1
view.touch_slop=40
view.minimum_fling_velocity=40
view.scroll_friction=0.008
ro.ril.enable.amr.wideband=1
wifi.supplicant_scan_interval=180
# 3G TurboCharger Enhancment!
net.dns1=8.8.8.8
net.dns2=8.8.4.4
net.tcp.buffersize.default=6144,87380,110208,6144,16384,110208
net.tcp.buffersize.wifi=262144,524288,1048576,262144,524288,1048576
net.tcp.buffersize.lte=262144,524288,1048576,262144,524288,1048576
net.tcp.buffersize.hsdpa=6144,262144,1048576,6144,262144,1048576
net.tcp.buffersize.evdo_b=6144,262144,1048576,6144,262144,1048576
net.tcp.buffersize.umts=6144,87380,110208,6144,16384,110208
net.tcp.buffersize.hspa=6144,87380,262144,6144,16384,262144
net.tcp.buffersize.gprs=6144,8760,11680,6144,8760,11680
net.tcp.buffersize.edge=6144,26280,35040,6144,16384,35040
# Signal (3G) tweaks
ro.ril.hsxpa=2
ro.ril.gprsclass=32
ro.ril.hep=1
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=28
ro.ril.enable.a53=1
ro.ril.enable.3g.prefix=1
ro.ril.htcmaskw1.bitmask=4294967295
ro.ril.htcmaskw1=268449905
ro.ril.hsupa.category=28
ro.ril.hsupa.category=7
ro.ril.def.agps.feature=1
ro.ril.enable.gea3=1
ro.ril.enable.fd.plmn.prefix=23402,23410,23411
# For HSDPA low throughput
ro.ril.disable.power.collapse=0
# Better signal reception
persist.cust.tel.eons=1
ro.config.hw_fast_dormancy=1
ro.ril.enable.amr.wideband=1
# NetSpeed Tweaks NetSpeed
net.tcp.buffersize.default=4096,87380,256960,4096, 16384,256960
net.tcp.buffersize.wifi=4096,87380,256960,4096,163 84,256960
net.tcp.buffersize.umts=4096,87380,256960,4096,163 84,256960
net.tcp.buffersize.gprs=4096,87380,256960,4096,163 84,256960
net.tcp.buffersize.edge=4096,87380,256960,4096,163 84,256960
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