Samsung gt s8000b. All locks are off and sim shows in menu. No signals shows.

SOURCE: My samsung Duos gt-b5722 not

Try other sim cards in the phone to be sure the problem is not from the sim. When you are sure the problem is not from the sim, try to reset the phones's factory settings. If it still does not work, then flash the phone.
If the fault was detected to be a sim fault, then get another line of the same network, and call your mobile service operators.
Hope this was helpful?

SOURCE: sim is inserted in GT

Make sure it is the original sim that belongs to that phone

SOURCE: samsung gt-s5620 showing no sim

gts5620 insart sim

SOURCE: my samsung mobile GT-S3310i sim lock on please sim

i have try many way but i cannot open my simlock code in sumsung GT S 3310i so is there anyway to break. Pliz help.

Ben Darden

• 984 Answers
• Posted on Jun 17, 2012

SOURCE: doesn't show contact of sim card of samsung galaxy GT-s5570 can u give me format code of samsung GT-s5570

Hi,

I'm Ben and -- hopefully -- I can provide some meaningful

assistance.

It seems that your SIM card is locked.

SIM CARD:

If you enter a wrong PIN code too many times, usually three,

your SIM will lock itself. This protects you from someone using

your personal information or making calls if your cell phone is

lost or stolen. You may see "PIN blocked" or Enter PUK code" on

your cell phone display. The PUK code stands for PIN Unblocking

Key. In the U.S., the PUK code is rarely provided when you get

your subscription.

If you do not have your PUK code, contact the Customer Care

customer again. Give them your phone number and once they

are sure it is really you, they will give you the PUK code.
You will then be asked to set a new PIN code. Once you have

your PUK be sure to keep it in a safe place.

Note that if you enter a wrong PUK 10 times in a row, the SIM

will be permanently blocked, and you'll need to purchase a new

SIM card.