最近作了3G聯網速度的調整
經本人的N1測試後
確實有比較順(3G訊號轉換停滯時間幾乎不會lag)，以及快40%~100%(視環境訊號)
3G/HSDPA/HSUPA(中華電信)
跟WIFI做比較
測試網址：www.dslreports.com/mspeed
用1MB的下載測試(必須先pass 100k的test)
**聲明：修改有風險，一定要備份！如果你完全不曉得這些是在幹嘛，do NOT do it!!
修改方式：
0.開啟root explorer(or any app like it)，switch到R/W模式
1.進入/system
2.長按build.prop，選copy
3.回到/sdcard的目錄，按左下角的paste貼上檔案
4.連接usb,把該檔案copy到電腦，然後用notepad打開編輯
5.增加下列指令：(如果原來沒有就增加；原來有，但值不同就修改；原來有，值也一樣，就保留)
ro.ril.hsxpa=2
ro.ril.gprsclass=12
ro.ril.hep=1
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=8
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
6.存檔，照原來的方式用root explorer copy修改過的build.prop覆寫回 /system (原來的檔案可以保留做備份)
7.重開機
8.N1會在2~3次重開機後逐漸fits in這些調整(不用刻意重開機，用一下子，有時間就reboot個二次), Done.
每人所處環境不同，因此結果可能有差異
但"應該"是會有所進步
供機友參考
Here are sth. you may want to know....
ro.ril.gprsclass: GPRS class of the target network :
Class 2 : 3 slots : 8 – 12 kbps upload / 16 – 24 kbps download
Class 4 : 4 slots : 8 – 12 kbps upload / 24 – 36 kbps download
Class 6 : 4 slots : 24 – 36 kbps upload / 24 – 36 kbps download
Class 8 : 5 slots : 8 – 12 kbps upload / 32 – 40 kbps download
Class 10 : 5 slots : 16 – 24 kbps upload / 32 – 48 kbps download
Class 12 : 5 slots : 32 – 48 kbps upload / 32 – 48 kbps download
o.ril.hsdpa.category :
Cat 1 = 1.2 Mbit/s
Cat 2 = 1.2 Mbit/s
Cat 3 = 1.8 Mbit/s
Cat 4 = 1.8 Mbit/s
Cat 5 = 3.6 Mbit/s
Cat 6 = 3.6 Mbit/s
Cat 7 = 7.2 Mbit/s
Cat 8 = 7.2 Mbit/s
Cat 9 = 10.1 Mbit/s
Cat 10 = 14.0 Mbit/s
Cat 11 = 0.9 Mbit/s
Cat 12 = 1.8 Mbit/s
Cat 13 = 17.6 Mbit/s
Cat 14 = 21.1 Mbit/s
Cat 15 = 23.4 Mbit/s
Cat 16 = 27.9 Mbit/s
Cat 19 = 35.3 Mbit/s
Cat 20 = 42.2 Mbit/s
Cat 21 = 23.4 Mbit/s
Cat 22 = 27.9 Mbit/s
Cat 23 = 35.3 Mbit/s
Cat 24 = 42.2 Mbit/s
Cat 25 = 46.8 Mbit/s
Cat 26 = 55.9 Mbit/s
Cat 27 = 70.6 Mbit/s
Cat 28 = 84.4 Mbit/s
ro.ril.hsupa.category :
..........Cat 1 = 0.73 Mbit/s
..........Cat 2 = 1.46 Mbit/s
..........Cat 3 = 1.46 Mbit/s
..........Cat 4 = 2.93 Mbit/s
..........Cat 5 = 2.00 Mbit/s
..........Cat 6 = 5.76 Mbit/s
..........Cat 7 = 11.5 Mbit/s
