You have just purchased an OPPO A77 and when you turn it on, it displays the following error text: SIM card not recognized. At times the OPPO A77 does not recognize the SIM card and displays this message. In this case, it is not necessarily necessary to bring the OPPO A77 directly back. In truth, there are a lot of tips to solve this problem. We will for that reason see in this article, what are the stuff to do and verify to ensure that the SIM card is recognized on your OPPO A77.
What to do when the SIM card is not recognized on my OPPO A77
Whenever the SIM card is not recognized on your OPPO A77, below is a list of stuff that could help you identify the source of the problem, see repairing the problem.
Clean SIM card
One of the first stuff to do if the SIM card is not recognized on your OPPO A77 is to wash it up. Actually, it might happen that dirt partially prevents the contact between the SIM card and the smartphone. To clean it, pass a small dab of cloth over it and check if it is not damaged.
Check the tracking of the SIM card on your OPPO A77
At times the problem might originate from the tracking of the SIM card. Actually, it often occurs that tiny metal plugs that most of the time have to come in contact with the SIM card are a bit relaxed. When this is the case, this prevents the OPPO A77 from reading the SIM card. To solve this problem, you just simply need to thicken the SIM a little by gluing 1 or two pieces of tape at the back.
Test the SIM card on another telephone
To find out if the problem comes from the SIM card, you can actually test it on another 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 OPPO A77
Whenever the two previous steps do not give anything, it can be necessary to test another SIM card to find out whenever the problem comes from the card. In truth, whenever other SIM card function on the OPPO A77, it can be because the problem comes from the card. Otherwise, it can be at the level of the telephone that we will have to look.
Verify that your OPPO A77 is not Simlocker
In case you have tried a lot of SIM cards on the OPPO A77 and none are recognized, the telephone may be Simlocker. It indicates that the OPPO A77 will recognize simply the SIM card of a specific operator. In this case, you have to unlock it. You will find without a hassle a lot of offer on the net that could do that.
Check that the problem does not originate from the ROM installed on the OPPO A77
This part mainly concerns the people who root the OPPO A77 to install a ROM that is not original. Whenever this is actually what you have carried out, be aware that the unrecognized SIM card problem is quite common after installing fresh ROMs. We recommend that you reinstall an original ROM and re-test it.
Whenever nothing works
Whenever all the above solutions do not work, we advise you to bring your OPPO A77 and the SIM card back to 1 of your operator’s shops.
