Question about Samsung SGH-U600 Cellular Phone

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Phone keeps saying invalid sim - Samsung SGH-U600 Cellular Phone

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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.

    If the message reads "PHONE LOCK," the SGH U600's automatic locking function is enabled. Enter the phone's password to unlock the phone.

    When using the phone for the first time, you will be prompted to enter a PIN. The PIN is given with the SIM card for your phone. Enter the PIN number exactly as given. You may also have the "PIN Check" feature enabled on your phone, which will require you to enter the PIN every time the phone is powered on. You can turn off "PIN Check" in the "Settings" menu.

    A message asking you to enter a PUK means you attempted to enter the PIN number three times and failed. You must contact your service provider to get a PUK.


  • Read more: Samsung SGH U600 Troubleshooting ' eHow.com http://www.ehow.com/way_5408527_samsung-sgh-u600-troubleshooting.html#ixzz11rVbifG3

    Posted on Oct 09, 2010

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