Showing posts with label hacking. Show all posts
Showing posts with label hacking. Show all posts

SAMSUNG E250 with diagram and hacking

Introduction:

The E250 is an entry-level slide phone and is one of the best phones in the entry-level price range. For less than 50 quid you get a cool-looking slide phone with a camera, music player, FM radio, Bluetooth and a memory card slot for storing loads of music. You can't go wrong with this one! Thin and compact, just the way you like it. Show your true flair with the smooth gliding action of the SAMSUNG E250’s slider design. Optimal in efficiency and functionality and highly compact, it’s ergonomic grip is unbeatable for comfort. The SAMSUNG E250’s built-in MP3 player virtually eliminates the need for a separate device to your own tunes, supporting various formats. Also featuring MP3 ringtones and expandable Micro SD file storage, boredom is unlikely to be a problem. The SAMSUNG E250’s gigantic 2.0" LCD dominates and has image resolution of 128 x 160 pixels for remarkably vivid, crisp pictures. View your downloads, play games, watch video clips, or simply shoot and snap with the luxury of one of the best quality screens. Tune into your favourite programs with the super handy FM radio. Like a mini-transistor set, this feature allows you to hear the latest local or national news, music and variety programs. The SGH-E250 comes with several advanced features such as u Menu, u Track, SOS Message and Auto Time Setting. With u Menu, users can create an ultra-convenient personalized menu for frequently-used features, saving time and effort. If your phone is lost or misplaced, uTrack sends an SMS to a pre-designated number to alert you when the SIM card is changed, boosting your chance of recovering the phone. SOS Message also sends an SMS alert, like a silent alarm, in case of emergency when you need help. And no worries about correctly resetting the time when you cross time zones, Auto Time Setting automatically does it for you in any GSM environment perfect for frequent travelers. invaluable PIM features including calendars, schedules, To Do lists and memo book keep you organized, and a full complement of clocks, alarms and calculators help you stay on track. Easily maintain all your contacts in the 1,000 entry phonebook. When the phone function is turned off, Offline Mode lets you access other functions to keep working or playing, undisturbed. With Speakerphone, continue your conversation hands-free while you perform other tasks. And don't forget the Voice Memo feature, with up to an hours worth of recording time, you can just keep reminding yourself.

Feature:

General:
2G Network: GSM 900 / 1800 / 1900 .Announced: 2006, October.Status: Available.

Size:
Dimensions: 99.5 x 49.5 x 14.1 mm Weight: 80 g.

Display:
Type: TFT, 65K colors Size: 128 x 160 pixels, 2.0 inches, 32 x 40 mm.

Ringtones:
Type: Polyphonic (64 channels), MP3 Customization: Download, Vibration: Yes.

Memory:
Phone book:1000 entries, Photo call Call records: 30 dialed, 30 received, 30 missed calls Card slot: micro SD (Trans Flash), buy memory:10 MB shared memory.

Data:
GPRS: Class 10 (4+1/3+2 slots), 32 - 48 kbps HSCSD: No EDGE: Yes 3G: No WLAN; No Bluetooth: Yes, v2.0 with A2DP Infrared port: No .USB: Yes, v1.1.

Other features :
Messaging: SMS, EMS, MMS, Email Browser: WAP 2.0/xHTML Games: Yes + Downloadable, Colors: Silver, Black Camera: VGA, 640x480 pixels, video(QCIF) - Java MIDP 2.0,FM radio,MP3/AAC/AAC+ player,T9,Organizer,Built-in handsfree,Voice memo.
Battery:
Standard battery, Li-Ion 750 mAh ,Stand-by: Up to 250 h. Talk time: Up to 5 h.
Hot feature:
Digital camera (0.3 megabytes) with 4x digital zoom ,Video camera ,Display: TFT LCD, 65,536 colors, 128 x 160 pixels ,Music Player (MP3, ACC, ACC+ formats) ,FM radio
Problem:

1.Ifa: I've a samsung e250.i downloaded games into my pc from mobile9.those games are compatible to my set.i've only memory card reader with me.i just copied games from pc to memory card after renaming it as .jar.but it is not possible yo play those games.please inform me an appropriate solution for this.
2.Jason: I am having Problems with formating samsung mobile E250 micro sd card. Whenever I try to format a card it is giving a error message. Earlier it was working fine but suddenly it has stopped working , so i tried to format the memory card but it did not worked. Can a virus in a computer can have done this when i have connected my mobile to PC. Or can mine memory card could have got damaged. I am using 1 GB Transcend micro SD card.
3.Shonika: I'm located in the USA and I purchased an Unlocked Samsung SGH-E250 Silver Tri-Band and I can recieve a music ringtone text messag, but I cannot Download the Music Ringtone. It tells me to go open the wap link, which I cannot. I cannot attach and send pictures by text messaging. I'm on AT&T who does not support Unlocked phones. What do I do ? AT&T said Unlocking removes some features ? Help.

Solve:
1.Ans: With the A707 (sync) you can't install unsigned java programs with out using the optional usb cable and samsung's free PC Studio software. The cable is under $10 online vs $40 in the store. Their justification for insisting we get games and apps exclusively by downloaded them from the phone is, "so that viruses don't start causing problems" --read that in email from an at&t tech.I don't know what would happen if you unlocked your sync and told it you had no carrier, then installed .jar s from the memory card. simply, one can only run downloaded games on the sync if one does some very simple modding.

2.Ans: The solution for the problem is quite simple, open up the folder, extract all the folders and files to ur desktop. Then do this, go back into my computer and format it normally, not using quick format. after that just put ur files back on there if u are 100% sure that they are not corrupting the device then wallah it works :) =] i just did it for 2 of my micro sd cards that didnt work properly.

3.Ans: Mobile phones often lose the browser default settings and sometimes have other configuration/setting problems when you unlock them. I have heard the range of issues from can't manually choose a network to won't send text messages. It is usually resource intensive for the carrier to solve the problem (and no guarantee you will stay with them) so that is why they would prefer you to use one of their branded phones. From a support and training standpoint it is just easier. At any rate, sorry for the troubles and have you tried to manually program in the WAP settings?
If not, the instructions are below:
http://www.wirelessgalaxy.com/mobilephones/cingular_wap_and_mms_settings.asp
And you should also attempt to download the operamini.com web browser so that you will not be 'restricted' in the sites you can view from your mobile.
Lastly, you might want to visit www.howardforums.com and see if there is a thread on there for this phone. Usually they are a great resource for tech heads that have experimented with all kinds of configurations and applications on their phones.

Hacking SAMSUNG E250


Walking Phone:SAMSUNG E250


Some Trix for this phone:


Diagram:
Samsung SGH-E250

Code:
sound code for Samsung e250: *#8999*8378#

The E250 is one of the best phone among all entry-level slide phone with a reasonable price. It is a cool looking camera phone. It has some problems but they are not major. I think it will be suitable for all kinds of people.

Hacking Nokia cellular phone

Nokia cellular phone hacking

Many old Nokia cellular phones have graphical LCDs based on the PCD8544 controller. These are perfect for various electronic projects with microcontrollers. The interface is a two-wire serial type (clock and data), and some additional signals. The LCD supply is a single 3.3 V with very low supply current. This is not really a "hack"; we are merely re-using parts of the phone.

Note that information here is for the Nokia 6150 specifically. However many older models (e.g. Nokia 5110) are very similar, and hence most stuff is applicable also to those. Below is an image showing the different parts of the front PCB (back side has no components).

Note how the keypad is partly divided into rows and columns. This is because those keys are multiplexed in this way. The other keys are more or less randomly connected to the rows and columns. Each button has an edge area and a center are, between which a short-circuit is created when the button is pressed. The upper switch is used to turn the phone on and off, and the buzzer is what emits the loud beep when e.g. receiving an SMS. The three testpads are connected to the phone's internal circuits, and have no real use in this context.

Since the LCDs only have the conductive-rubber type of connection, the easiest method of hooking a microcontroller up to it is to re-use the whole PCB. The connection on the back has two rows of 14 pins each, which I numbered A1 through A14 and B1 through B14.

The image below shows the numbering convention I have used. Note that the ribbon cable was soldered to the board as part of the hack. It is normally not there when you open the phone.

A table below describes the function of each pin.

Pin Function Explanation
A1 LED & buzzer ground
A2 Switch output Shorted to A8 (ground) when switch is pressed
A3 LCD D/C Selects data (high) or command (low) for LCD communication
A4 LCD SCLK LCD serial clock
A5 LCD SDIN LCD serial data
A6 LCD /SCE LCD chip enable (active low)
A7 LCD /RES LCD reset (active low)
A8 Ground LCD ground supply, middle testpad, switch ground
A9 Buzzer control
A10 LCD Vdd Positive supply for LCD (2.8 - 3.3 V), LCD Osc (note 1)
A11 not connected
A12 LED control Set high to turn on LEDs
A13 Speaker 1 Differential driving through passive filter (?)
A14 Speaker 2 Differential driving through passive filter (?)
B1 LED & buzzer positive supply Ca +3.9 V supply (note 2)
B2 Connected to B3
B3 Connected to B2
B4 Leftmost testpad
B5 Row 4, "right" edge
B6 Row 3, "down" center, "hang up" center
B7 Row 2, "answer" center, "up" center
B8 Row 1, "left" center
B9 Rightmost testpad
B10 Column 3, switch output (through diode) (note 3)
B11 Column 2
B12 Column 1
B13 "Left" edge, "up" edge, "down" edge, "right" center
B14 "Answer" edge, "hang up" edge

Note 1: A decoupling capacitor is installed between LCD Vdd and LCD ground on the PCB.
Note 2: The LEDs are driven by a constant-current circuit, equal to (0.5*U(A12) - 0.7)/15 A for the display LEDs and (0.6*U(A12) - 0.7)/15 for the keypad LEDs. These formulas are valid as long as U(B1) is larger than 2.0 + 0.6*U(A12), which gives approx. 3.9 V as lower limit, but this is not critical. However, buzzer requires more than 3.3 V.
Note 3: The anode of the diode is connected to B10, and cathode to the switch output. Not sure why this wiring is used...

The LCD operates in the range 2.8 - 3.3 V, and hence all other signals should also be within that range. To use the LCD, required signals are: A3, A4, A5, A6, A7, A8, and A10. I will not go into details about how the signals are used, how stuff is written to the LCD, etc, since that is covered by the PCD8544 datasheet. However, I will give a proper initialization sequence, which is useful for checking that the LCD is working:

  • Reset LCD with a short low pulse on /RST signal at power-on
  • Command 0x21 (function set - extended)
  • Command 0xC6 (set operation voltage to 7 V)
  • Command 0x13
  • Command 0x20 (function set - basic)
  • Command 0x0C (configuration - normal mode)
  • Data 0xAA (turn on a few pixels)

The LCD should now show a vertical pattern of 10101010 in the top leftmost corner. You can download an ASM file for Atmel's microcontroller ATmega8. The file contains a program that writes some stuff to the LCD and then turns the contrast up & down repeatedly.

Once the basic communication is working, doing graphics on the LCD is not very difficult:


Nokia cellular phone hacking

 
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