Tweaks for 2G/3G/Wifi Speed Improvement Z series

 Problem on the 2G (Edge) / 3G / Wifi connection ?
HSPA/HSDPA was fine, but the 2G connection was virtually non-existent.
I always get page time outs and no indication of loading, no matter what app or browser i use.

i was forced to leave the network settings to wcdma only. however,
 this is not practical since once i get to 2G only location (yes, those places still exist )
i lose all signal until i set network to wcdma/gsm or gsm only.

So after a few days experimenting with the build.prop,
if any of you guys have the same problem or want to boost your 2G/3G connections,

Build.prop Tweaks
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Add the following at the end of the build.prop, save and reboot:
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#signal tweak
ro.ril.enable.3g.prefix=0
ro.ril.enable.dtm=0
ro.ril.hep=0
ro.ril.hsxpa=5
ro.ril.enable.a53=1
ro.ril.gprsclass=12
ro.ril.hsupa.category=9
ro.ril.hsdpa.category=36

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ro.ril.enable.dtm
Enable "dual transfer mode" on EDGE networks; requires different GPRS class setting.
Only set this to 1 if your network allows simultaneous transfer of Circuit switched (CS)
voice and Packet switched (PS) data over the same radio channel (ARFCN).