3G mobile phone and Wifi N speed

3G + HSPA = Teoretical speed 7.2 MBs , real speed around 5.9Mbs

3G DIGI RDS SpeedTest

4G - Teoretical  speed of 150 Mbs

Digi RDS - LTE 4G 2600 MHz (TDD – canal 38)

WiFi speed test on N with a 150M Wireless Lite N RouterTL-WR740N and a ALLView A5 Smiley phone

SATA mode : AHCI vs IDE vs RAID

AHCI  - is the native sata mode.
- supports hot plugging (add/remove component while the computer is running) and some faster indexing
To be able to take advantage of the sata hot-plug your motherboard or sata controller must also be sata hotplug capable ( not all are ).
If it is, and it is activated from BIOS you will see the Safely Remove Hardware icon on the system tray, and your hard drive will be listed there.

RAID - is AHCI mode plus vendor specific raid configurations

Although windows vista or later has AHCI support will not load the driver at start-up if the os was installed in IDE mode, but can be installed in windows after booting in IDE mode.

AHCI support exists in Windows Vista, 7 and 8.
Windows Xp only supports IDE mode natively at boot but you can add a sata/raid driver via the F6 boot option or after the os is installed.