You have just acquired an Doro Liberto 820 and when you turn it on, it displays the following error text: SIM card not recognized. At times the Doro Liberto 820 does not recognize the SIM card and displays this message. In this circumstance, it is not necessarily necessary to bring the Doro Liberto 820 directly back. Certainly, there are many methods to fix this problem. We will therefore observe in this tuto, what are the stuff to do and confirm to ensure that the SIM card is recognized on your Doro Liberto 820.
How to proceed when ever the SIM card is not recognized on my Doro Liberto 820
If perhaps the SIM card is not recognized on your Doro Liberto 820, below is a list of stuff that could help you determine the source of the problem, observe repairing the problem.
Clean SIM card
One of the first stuff to do if the SIM card is not recognized on your Doro Liberto 820 is to wash it up. In truth, it might happen that dirt partially prevents the contact between the SIM card and the mobile. To wash it, pass a small dab of cloth over it and check if it is not damaged.
Check the location of the SIM card on your Doro Liberto 820
At times the problem might come from the location of the SIM card. In truth, it often happens that tiny metal plugs that most of the time have to come in contact with the SIM card are a little bit relaxed. When this is the case, this prevents the Doro Liberto 820 from reading the SIM card. To fix this problem, you just need to thicken the SIM a little by gluing one or two pieces of tape at the back.
Test the SIM card on a different smartphone
To find out if the problem originates from the SIM card, you can actually test it on a different phone and you will have your answer. If it is not recognized on other devices, you can actually modify the SIM card.
Try another SIM card on your Doro Liberto 820
If perhaps the two previous steps do not give anything, it’s necessary to test a different SIM card to find out if perhaps the problem originates from the card. Certainly, if perhaps other SIM card work on the Doro Liberto 820, it’s because the problem originates from the card. Otherwise, it’s at the level of the smartphone that we will have to look.
Check that your Doro Liberto 820 is not Simlocker
If you have tried many SIM cards on the Doro Liberto 820 and non-e are recognized, the smartphone could be Simlocker. It indicates that the Doro Liberto 820 will recognize just the SIM card of a certain operator. In this circumstance, you have to unlock it. You will find without a hassle a lot of offer on the web that could do that.
Check that the problem doesn’t come from the ROM installed on the Doro Liberto 820
This part mainly concerns the people who root the Doro Liberto 820 to install a ROM that is not original. If perhaps this is actually what you have done, be aware that the unrecognized SIM card problem is quite common after setting up new ROMs. We highly recommend that you reinstall an original ROM and re-test it.
If perhaps nothing works
If perhaps all the above solutions do not work, we recommend you to bring your Doro Liberto 820 and the SIM card back to one of your operator’s shops.
