How to unlock android x20i..need user and password

You can use Google /Samsung account to unlock the phone. If you forget your account detail somehow and don't want to factory reset causing the data loss, you can only use the Broken Android Data Extraction to unlock your phone.

Here comes more detail.
TIL How to Unlock Android Phone Password without Factory Reset

How to Unlock Samsung Phone without Password

Broken Android Data Extraction Fix Error Recover Data from Broken Android

How to unlock any Samsung phone
Just follow 3 simple steps to unlock your Samsung Phone.
1) Go to https://www.unlockninja.com/unlock-samsung+phone
2) Select your model no and switch the next step
3) select network and country and apply to get the unlock code.



Official Samsung IMEI Permanent Unlock Important Select the Current...

If you kust Google this option there are a few options. I have provided the 1st two here.

How To Unlock Samsung Galaxy Young and Samsung Galaxy Young DUOS

http://sim-unlock.net/simlock/Samsung/Galaxy_Y_S5360/

Hi, You can unlock a Samsung Galaxy Note II locked to AT&T network safer and easier using unlock code. You can get the unlock code for a Samsung Galaxy Note II from www.wickedunlock.com at affordable cost with easy unlocking guide. Good luck mate.

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Check the following service, it works if your phone is locked to a provider from Europe, USA, Canada, Australia or Latin America: http://www.fastgsm.com/en/samsung/samsung/e1230/network-unlocker

Dear Friend,
If Your Samsung Not Accept Your New Sim.You Need To Unlock Your Samsung. Through Imei Unlock code Is More Convineint.You Can Unlock Your Samsung. Call Your Network Provider To Ask Your Samsung SGH T401G Unlock Code. But your Network Provider Takes Time To Give You Unlock Code.
If You Want Your Imei Unlock Code Instantly. Buy Samsung Imei Unlock Code From Third Party. Many Sites Available Online To Provide Imei Unlock Code.
I Hope This Will Help You.
Thank's

Samsung E2100B Unlocking Instructions

Warning : Do not enter any wrong unlock codes on your Samsung E2100B mobile phones. If you enter over a certain amount of wrong unlock codes on your Samsung E2100B mobile phone, your phone may get hard locked and sometimes become unusable.
Method 1:

1 - Switch ON your Samsung E2100B with a NOT ACCEPTED SIM Card.
2 - Samsung E2100B will ask for "Password".
3 - Enter the Unlock Code.

OR (if the Samsung E2100B shows "Insert Correct SIM Card")

Method 2:

1 - Switch ON your Samsung E2100B with a NOT ACCEPTED SIM Card.
2 - Don't bother about what's being displayed on your Samsung E2100B.
3 - Compose : #0111*CODE#.

NOT ACCEPTED: I mean, to use a sim card from a network other than the network your Samsung E2100B is locked to.
CODE: Its the unique Unlock Code for your Samsung E2100B.

If method 2 does not work, you can try method 2 again but this time without any SIM card on your Samsung E2100B.

You can unlock your mobile using instruction..Get the following instruction here mobileunlockguide.com

Method 1:

1 - Switch ON your Samsung X508 with a NOT ACCEPTED SIM Card.
2 - Samsung X508 will ask for "Password".
3 - Enter the Unlock Code.

OR (if the Samsung X508 shows "Insert Correct SIM Card")

Method 2:

1 - Switch ON your Samsung X508 with a NOT ACCEPTED SIM Card.
2 - Don't bother about what's being displayed on your Samsung X508.
3 - Compose : #0111*CODE#.