My co-worker gave me her sons old samsung impression to replace my daughters broken phone until we are able to upgrade, however the screen is locked and he doesn't remember the code! Since his sim card is no longer in the phone and he has a new one I'm not sure how to solve the problem. Should I just give the phone back and forget it? Thank You

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To unlock your samsung mobiles with codes are the best one, because it is easy & safe also,
Follow the instructions :

Warning : Do not enter any wrong unlock codes on your Samsung SGH-A877 Impression mobile phones. If you enter over a certain amount of wrong unlock codes on your Samsung SGH-A877 Impression mobile phone, your phone may get hard locked and sometimes become unusable.
Method 1:

1 - Switch ON your Samsung SGH-A877 Impression with a NOT ACCEPTED SIM Card.
2 - Samsung SGH-A877 Impression will ask for "Password".
3 - Enter the Unlock Code.

OR (if the Samsung SGH-A877 Impression shows "Insert Correct SIM Card")

Method 2:

1 - Switch ON your Samsung SGH-A877 Impression with a NOT ACCEPTED SIM Card.
2 - Don't bother about what's being displayed on your Samsung SGH-A877 Impression.
3 - Compose : #0111*CODE#.

NOT ACCEPTED: We mean, to use a sim card from a network other than the network your Samsung SGH-A877 Impression is locked to.
CODE: Its the unique Unlock Code for your Samsung SGH-A877 Impression.

If method 2 does not work, you can try method 2 again but this time without any SIM card on your Samsung SGH-A877 Impression.

Get the unlock code from this site http://www.theunlockspot.com/samsung-sgh-a877-impression/rs10wp9/ to your samsung mobile........

Hi it is available on samsung website you can easily get it by selecting Manuals & Download button. https://www.samsung.com/us/support/owners/product/impression-at-t

You can get the Unlock code at Reliable cost here http://www.mobileunlocksolutions.com/samsung-sgh-a877-impression/rs1wp9/
and Unlock the Samsung SGH-A877.

you can get the unlock code for your Samsung model mobile, through this site http://www.unlocking4u.com/samsung-sgh-a877-impression/rs6wp9/
It has the best instructions and easy methods for unlocking mobile phones........

you can get unlock code for samsung phones by third party after unlock samsung you can use any GSM network Sim card around the world

Try http://www.reabo.co.uk/_tutorials/sim-unlock-samsung.aspx

1. Power on your Samsung Impression A877.
2. Type *#06# on your phone’s keypad.
3. First 15 digits of output is your Samsung Impression A877’s IMEI number.
With your IMEI number you should be able to attain your free unlock code. Once you have your unlock code we can begin the unlock steps. You can find more information from this article on How To Unlock Samsung SGH-A877. Here are the steps to unlock your Samsung Impression A877:
How To Unlock Samsung Impression A877 1. Power on your Samsung Impression A877 without the SIM card in.
2. Type #7465625*638*CODE# (where CODE = your 8 digit unlock code)
3. Phone will display “Network Lock Deactivated”
4. Samsung Impression A877 may auto reboot.

3 options..

1st: Call ur service provider if what thet= could offer.

2nd: Call your insurance company(if u have one)

3rd: send the phone to Samsung, but you need to call them first.

*note* Samsung does not replace phones nor provide loaner phones

try 00000000 but it maynot work. This is the master reset code for a samsung. But it maynot work for the sim code or Phone lock code.