Question about Samsung SGH-U600 Cellular Phone

1 Answer

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

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,574 Answers

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 '

    Posted on Oct 09, 2010


    1 Suggested Answer

    • 2 Answers

    SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

    a 6ya expert can help you resolve that issue over the phone in a minute or two.
    Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
    New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
    click here to download the app (for users in the US for now) and get all the help you need.

    Posted on Jan 02, 2017


    Add Your Answer

    Uploading: 0%


    Complete. Click "Add" to insert your video. Add



    Related Questions:

    1 Answer

    Fix my sim card as phone keeps saying 'invalid sim', SOS calls only

    Contact your service provider & ask them to send you a new SIM card

    Sep 26, 2014 | Apple Iphone 4s I Phone 4 S Factory...

    1 Answer

    What is the solution to nokia E63 writing sim card invalid?

    If the Nokia E63 says Insert Valid Sim means it locked to network...You need to unlock it...You can get the unlock code from the site
    and unlock it from network lock.

    May 05, 2012 | Cell Phones

    1 Answer

    My E5 keeps sayin invalid sim

    It the Phones says invalid Sim card means it locked to Network you need to unlock it from the network lock,you can get the network unlock code from here and unlock it from Network lock,then you can use with any GSM Network Sim card in the Phone.....You need to find the network and country it locked now and specify that to get the unlock code....

    Sep 21, 2011 | Nokia E5 Cell Phone

    1 Answer

    When i insert my sim card it keeps saying insert sim

    Either inserting it incorrectly or a defective/locked SIM from another service provider that is locked to only work on their phones... usually the phone will say "invalid SIM" however...

    Nov 27, 2009 | Samsung Saga Cell Phone

    1 Answer

    Cect i68+ keeps saying invalid sim what can i do about it

    check ebay for invalid sim, definate solution for this phone

    Oct 24, 2009 | Dual Electronics CECT P168 Cellular Phone

    2 Answers

    Invalid sim message on i68 phone

    i have the same problem i keep on putting my sims in (one tesco sim & one voda phone sim) and it said the same thing invalid sim. the sim regestars for about 2 seconds then it either says invalid sim or emergancey calls. whats a matter with it should i send it back.kjr2502

    Mar 12, 2009 | Dual Electronics CECT P168 Cellular Phone

    3 Answers

    Blackberry curve 8310 says invalid sim

    how setting invalid sim ? cell phone setting or software plz ask me reason

    Dec 21, 2008 | RIM BlackBerry Curve 8310 Smartphone

    1 Answer

    Cect p168

    Is the SIM an iPhone SIM? O2 have an iPhone specific SIM which is not the same as a 'normal' O2 SIM.

    Sep 06, 2008 | Apple iPhone Smartphone

    Not finding what you are looking for?
    Samsung SGH-U600 Cellular Phone Logo

    259 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Samsung Cell Phones Experts

    Donald DCruz
    Donald DCruz

    Level 3 Expert

    17130 Answers

    Computer Repairing
    Computer Repairing

    Level 3 Expert

    14641 Answers

    Fotis Papastamatiou

    Level 2 Expert

    103 Answers

    Are you a Samsung Cell Phone Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides