Solution/Fix For USIM/SIM Card Not Detected or Is Invalid

USIM SIM Card error not detected Regardless of your Modem/USB dongle or Broadband you are having but provided you are getting this error of SIM/USIM Card is not Detected or is Invalid, this is the article you got to read since by the time you go through it, you will have discovered the solution for the above problem and how you can fix it easily and by your own self.

It so happens that many modems end up giving the error above when one happens to insert a different SIM card other than that of the first internet service provider and where by in situations like having traveled from one location to another, having switched an ISP and other reasons, one may feel like using the same gadget but only to fail due to the above error.

Whether you are running a ZTE, a Huawei, an Alcatel dongle or any other and from the different service providers for example Vodafone, MTN, Airtel, UTL, Warid, Safaricom, Yu, Kenkom and any other, you need not to worry since you will be able to do this by your own self and at least I know basing on the same procedure and process I went through some few days back when my friend from a different country donated to me a modem but which was locked to the provider he was using in his country.

What Does The Error Stand For?

The error above in simple terms means that your modem is locked to only a single provider. Many of them do prompt for an unlock code which can be generated for free – read how to unlock your modems here but in case you get the above error without an unlock code prompt, then you are the target here. Before can think of visiting amazon to order a new usb 3g modem, you can first get started with solving your SIM/USIM Card is not Detected or is Invalid error, there are a few things you need to consider since as a must, you need them in order to complete the step by step towards unlocking your device and below are they, a Computer connected to the internet, your USB internet dongle, Modem or Broadband. And Once you have the above, the next step is to do the following below.

Enter your email, select new user, enter name, wait, add and finish all using this Free.

1. Get Dc-unlocker dongle and and download the the DC-Unlocking Client in Zip folder.
2. Unzip and extract the files in the folder and run the Client.

3. Now connect your modem with the SIM/USIM Card is not Detected or is Invalid error and click on the mirror icon which stands for search.
4. Once your modem has been detected, click on the Unlocking option and your modem will be unlocked.

Assuming you are prompted to enter the user name and password, enter “free” for user name and “voice” for password all without quotes. You can use above solution to solve modems like Huawei b970, e970, d12hw, e220, e1550, e173, mf190, k3565 and many more others as contained in the Unlocking client.


Add a Comment
  1. my ZTE modem wun’t even be detected by the dc unlocker…when i insert an inverlid sim, it starts normally as if the sincard is valid…please help

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  2. Hi. This will sound ridiculous, but check also the SIM card correct position. In my case, using the wrong size of SIM card triggered the same error. With the correct adapter, that was solved.
    Posting here for the next absent-minded person 🙂

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  3. My modern is unlocked but i still get same error

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  4. Mine is Osprey 2 modem Y854VB locked to EE in the UK.
    For any other sim inserted the response is “No Sim Card”.
    No unlock sim prompt.
    I suspect the modem was manufactured by alcatel… not so sure.

    Any help please?

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  5. You’re so cool! I don’t suppose Ive learn anything like this before.
    So nice to find any person with some authentic thoughts on this subject.
    Really thank you for starting this up.
    This website is something that is wanted on the internet, someone with a little bit originality.
    Useful job for bringing something new to the web! 972016

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  6. Hello :3
    Please Help Me.
    Im From Philippines.
    I Am Using ZTE Modem.
    Network; SMART

    – When Im In Pampanga, Im Using A Laptop With Windows XP
    – I Have No Problem Using My ZTE MODEM On My Laptop.

    – I Am At iLocos Now , Just 2Days Ago.
    – I Am Using A Different Laptop Now, Windows 7.
    – But I Cannot Use My ZTE Modem.
    – It Cannot Detect My (U)SimCard / No Service / Not Found.

    Please HELP Me On Solving This Problem. Thanks! A Little Help Would Be Very Much Appreciated. 🙂

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  7. I am sorry if I sound stupid but…..I can’t get online without my air card. So is there another way??

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  8. Thanks for the great tutorial. My e220 is unlocked now

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