I'm using Samsung SGH-F480. I recently faced a problem, it won't start up. When I turn it on, it stuck at the first loading screen (something like big word on top ''SGH-F480''

Hi,after getting codes for your mobile follow the instructions about how to unlock your mobile..
Warning: Do not enter any wrong unlock unlock codes on your Samsung SGH-F480 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.

Method 1:

1 - Switch ON your Samsung SGH-F480 with a NOT ACCEPTED SIM Card.
2 - Samsung SGH-F480 will ask for "Password".
3 - Enter the Unlock Code.

OR (if the Samsung SGH-F480 shows "Insert Correct SIM Card")

Method 2:

1 - Switch ON your Samsung SGH-F480 with a NOT ACCEPTED SIM Card.
2 - Don't bother about what's being displayed on your Samsung SGH-F480.
3 - Compose : #0111*CODE#.

NOT ACCEPTED: We mean, to use a sim card from a network other than the network your Samsung SGH-F480 is locked to.
CODE: Its the unique Unlock Code for your Samsung SGH-F480.

If method 2 does not work, you can try method 2 again but this time without any SIM card on your Samsung SGH-F480.

Each Samsung SGH-F480 mobile phone has an unique unlock code.
i got instruction from mobileunlockguide

At first set up your phone with charger and start power supply. Then press the on button and main button at the same time. try it for some times and your phone will turned on again. But check your battery first. Is is dead or not?
thanks
Arnob

samsung sgh t939 sim network unlock pin

you can try to hard reset *2767*3855#

try FULL reset by typing: *2767*3855#(star 2767 star 3855 hash)

hard reset *2767*3855#


All Samsung Hard Reset Codes
In those steps:

1.)*2767*3855#
2.)*7465625*638*00000000*00000000#
3.)#7465625*638*00000000#

Now your phone is unlock forever Permanent



Here is Samsung F480 Secret Codes

Admin Settings: *#6984125*#
Admin Settings
Internals (sub menu): *#9072641*#
Developer Settings: *#0523#
Camera test mode:
Press *#36287# key string in the dial screen to enter camera test mode -
[1] Auto focus [On]
[2] ISP firmware write
[3] ISP firmware version check

[1] Press the "1" key to disable auto focus. In order to enable auto focus, press the "1" key again.

[2] Press the "2" key to write the ISP (Camera Module) firmware. “ISP firmware write [Please wait]” will be displayed during 2 minutes. Then "ISP firmware write [SUCCESS]” will be displayed when the firmware upload finished.

Sorry. It's impossible. This is defect of F480. :(

copy all your contact to your sim card and insert the card to your new phone.

press Camera button + volume down + power button ( together )
if the mobile turn on and show ( download or any word .. so you can fix it by changing the software )

hard reset *2767*3855#