It would also be great if every shared the script they use with which network.
You'll need a rooted Streak and Root Explorer.
Add/edit these entries to "/system/build.prop" (you must mount to r/w and open with Text Editor). Make sure that these are not already in your build.prop, if they are, then just edit the values.
ro.ril.hsxpa=2 (higher values are invalid until proven otherwise)
[0=UMTS] [1=HSPDA only] [2=HSPDA & HSUPA]
ro.ril.gprsclass=10 (Class 10 to save battery)
The Streak supports Class 12 GPRS, set to 12 to increase EDGE speed
ro.ril.hep=1 (no info available, no change when turned off)
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).
ro.ril.hsdpa.category=8 (Cat 8 is the Streak's max)
ro.ril.hsupa.category=6 (Cat 6 is the Streak's max)
ro.ril.enable.a53=1 (enable increased ciphering on HSDPA/HSUPA)
ro.ril.enable.3g.prefix=1 (Adds the 3G prefix e.g. Optus 3G, etc.)
All Carries have their own specific settings they should use.
As Im using Optus Prepaid in Australia these are the setting I use. Lots of experimenting went into these and my 3G works better than ever. Best SpeedTest I've got was D2.98/U1.52 48ms ping on 4 bars, average is about D2.5/U1.0 80ms.
ro.ril.enable.dtm=0 ro.ril.gprsclass=10 ro.ril.hep=0 ro.ril.enable.3g.prefix=1 ro.ril.hsdpa.category=8 ro.ril.hsupa.category=6 ro.ril.hsxpa=2 ro.ril.enable.a53=1
- Includes step by step to editing build.prop via ADB or Root Explorer.
After adding, save and remount to r/o. You might need to restart TWISE to get this completely working.
Happy Streaking =)
This will not increase the power of your antenna or increase radiation. All this does is choose the best profiles for EDGE/HSDPA/HSUPA. Its proven to increase speed and connection strength.