CORE_TECH

1.  *#*#4636#*#* - About phone. 2.  *#*#7780#*#* - Restore factory. 3.  *2767*3855# - Reinstalls phones firmware. 4.  *#*#34971539#*#* - About camera. 5.  *#*#7594#*#* - Changing the power button behavior enables direct power off. 6.  *#*#273283*255*663282*#*#* - Backup media files. 7.  *#*#197328640#*#* - Test mode for service activity. 8.  *#*#232339#*#* -  Wireless lan test. 9.  *#*#232338#*#* - Displays Wi-Fi mac address. 10.  *#*#1472365#*#* - GPS test. 11.  *#*#1575#*#* - Different GPS test. 12.  *#*#0283#*#* - Packet loop back test. 13.  *#*#0*#*#* - LCD display test. 14.  *#*#0673#*#* - Audio test. 15.  *#*#0842#*#* - Vibration and backlight test. 16.  *#*#2663#*#* - Displays touch screen test. 17.  *#*#0588#*#* - Proximity sensor test. 19.  *#*#232331#*#* - Bluetooth test. 20.  *#*#7262626#*#* - Field test. 21.  *#*#232337#*#* - Displays bluetooth device address. 22.  *#*#8255#*#* - G-talk monitoring. 23.  *#*#4986*2650468#*#* - PDA,

Two-Channel PC Based Oscilloscope USB Inroduction More and more experiments are now ‘PC-assisted.’ Also conventional acquisition systems are very expensive. Since portable  PCs are today common and a USB link is a better solutionhere we present an oscilloscope using USB port of the PC that operates at up to 10 kHz with ±16V input voltage. It has much more improved features than the PC-based oscilloscope . The oscilloscope uses IC PIC18F2550 from  Microchip as the main controller, which makes the oscilloscope compact as there is no need of additional power supply for the entire circuit board. Circuit description      At the heart of this oscilloscope is USB2.0-compliant microcontroller PIC18F2550 from Microchip. You can also use  IC18F2445 in place of PIC18F2550. Specifications of this microcontroller are:- Features of 18F2550 Programming 1. Up to 32 kB of flash memory, 2kB RAM and 256-byte EEPRO