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Samsung X475 "Contact Provider" "SIM Error"

I purchased my Samsung X475 directly from T-Mobile in 2005. Up until recently, I had no problem with my Samsung X475. Not sure if this caused the problem, but I then purchased a Motorola A780. I had problems with that phone "freezing," so put my SIM card back into my X475 and immediately started getting these errors about every 3 hours "CONTACT PROVIDER" then when I opened the "flip," it said "SIM Error." If I turned the phone off/on, it worked again, but in 2-3 hours it errored again. I called T-Mobile and they had never heard of this particular error. I took it to the T-Mobile store. They didn't have any "machine" to test my card, and they didn't know what the error was either. Any suggestions?

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6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 99 Answers

SOURCE: contact service provider

U have to unlock u'r phone, it is locked to a different carrier then the one U are using

Posted on Sep 11, 2007

  • 38 Answers

SOURCE: Contact Service Provider

If you have the mini usb i may have the tools soft for it.
But it will only work on Bootloader version 8.26 and below.
To find out what boot load version is your phone, just press # * @ the same time while pressing the power button.
If your bootload is the one above or below the email me for the software. but only if you have the mini usb cable.
The software will flash the the phone unlock it and then you can put what ever carrier software you may want.

Posted on Jan 06, 2008

  • 396 Answers

SOURCE: Phone displays"sim locked! Contact service provider"

If you are on Cingular/AT&T, you can go to aT&T's website to fill out a form and get the SIM unlock code for yourself. I dont know about the other carriers. Remember some carriers may NOT use SIM cards.

Posted on Mar 12, 2008

  • 544 Answers

SOURCE: phone freeze sim anavailable please contact


if it is asking a PUK you can refer to this suggestion.

PUK means "personal unlocking key" .

The PUK code is asked if you enter a wrong pin 3 times.

You need to call your phone service company, they can retrieve the puk code from a database
for free.

In your case you need to contact your SIM card phone provider technical support to unlock the SIM.

The PIN and PUK are related to the SIM card, not to the phone.

If you replace the SIM card with a different one, then the phone should not ask for the PUK anymore.

thank you,

Posted on Mar 29, 2009

  • 83 Answers

SOURCE: phone shows contact service provider

does it have a sim card? did it ask for the puk? if it does get a hod of your service provider. you may have disabled the sim card. usually meaning it got fried

Posted on Apr 24, 2009

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You can get your PUK Code from your service provider. Should be a quick call after they verify your account info. Unfortunately there is not DEFAULT PUK Code and provider is the only one that can tell you what your SIM PUK was set to.

Please don't forget to mark if this solution solved your issue.

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Samsung SGH-x475 t-mobile unlock code

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after you do that it will seem to shutoff but leave it and it will then open up to working screen... you will have to enter this code each time you turn off the phone but it should work,,, if u have any questions... e-mail me at

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