Question about Samsung SGH-X830 Cellular Phone

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U600 unable to dial number

Hi there
i am unable to dial a certain number, it says "Change by SIM" and then automatically redirects to me Messages?!
i tried to delete the number completely from my SIM or phone memory and jus dial normally, but everytime that comes up, i can't even call that number.

i must've pressed something accidently?
please help.


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Doesnt work =(

Posted on Mar 28, 2008

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  • 7,752 Answers

Typed *2767*3855# this should manu reset the entire main-board.

Posted on Mar 27, 2008


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1 Answer

What does Fixed Dialling Numbers mean?

Fixed Dialing Numbers or FDN list is a SIM card based security feature which allows the phone to be "locked" so that it can only dial certain numbers, or numbers with certain prefixes.

A PIN2 code (numeric password) protects the allowed list of numbers from being changed by any person who does not know the PIN2 code.

In FDN mode, your device will restrict outgoing calls, except for the numbers stored in the FDN list.

To activate FDN mode,
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Warning: PIN2 is a serious SIM-based security feature of the handset. If you are not sure of your PIN2, please do not enter random PIN2. When you access a menu requiring the PIN2, you must enter the PIN2 supplied with the SIM or USIM card. Contact your service provider/ Network for your PIN2. If the wrong PIN2 code is entered three times in a row, PIN Lock(PUK2) will be automatically activated.

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Xperia x8 handset i hv n m unable to send text messages need quick solution for this hectic problem


Please, use another Sim with the phone, if the Sim can send messages, definitely sounds like an error in the SMS centre number. You can change this by following the below steps:

1. Open your dialer and dial: *#*#4636#*#*.
2. From the menus which appear, select Phone Information.
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Messages When You Turn on the Phone
  • When turning on your phone you may find a message requiring you to take a certain action before you can use the phone. If the message says "INSERT SIM," make sure the SIM card is installed in the phone or that it hasn't become loose. The SIM card is located in the battery compartment. Remove the battery cover and the battery. The SIM card should be located near the bottom of the phone under the metal hinge. Insert or secure the SIM card with the contacts facing down, reinsert the battery and batter cover, and turn your phone on again.

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    Voice Dial:
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    Her's a .pdf file of the user manual, which you can save to your computer:

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    Still need help on this!

    reflash the phone with latest firmware

    Mar 27, 2008 | Samsung SGH-X830 Cellular Phone

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