You have just purchased an Oppo A7n and when you turn it on, it displays the following error text message: SIM card not recognized. Oftentimes the Oppo A7n does not recognize the SIM card and displays this message. In this case, it is not necessarily necessary to bring the Oppo A7n directly back. In fact, there are a lot of tips to fix this problem. We will for that reason find out in this tuto, what are the things to do and verify to ensure that the SIM card is recognized on your Oppo A7n.
How to proceed when ever the SIM card is not recognized on my Oppo A7n
If the SIM card is not recognized on your Oppo A7n, below is a list of things that can help you discover the source of the problem, find out repairing the problem.
Clean SIM card
One of the first things to do if the SIM card is not recognized on your Oppo A7n is to wash it up. In fact, it may possibly happen that dirt partially prevents the contact between the SIM card and the phone. 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 Oppo A7n
Oftentimes the problem may possibly be caused by the location of the SIM card. In fact, it often occurs that tiny metal plugs that normally have to come in contact with the SIM card are a little bit relaxed. When this is the case, this prevents the Oppo A7n from reading the SIM card. To fix this problem, you just have to thicken the SIM a little by gluing 1 or two pieces of tape at the back.
Test the SIM card on another phone
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 change the SIM card.
Try another SIM card on your Oppo A7n
If the two previous steps do not give anything, it is actually necessary to test another SIM card to find out if perhaps the problem comes from the card. In fact, if perhaps other SIM card work on the Oppo A7n, it is actually because the problem comes from the card. Otherwise, it is actually at the level of the phone that we will have to look.
Check that your Oppo A7n is not Simlocker
If you have tried a lot of SIM cards on the Oppo A7n and none are recognized, the phone could be Simlocker. This means that the Oppo A7n will recognize just the SIM card of a certain operator. In this case, you have to unlock it. You will find without a hassle a lot of provide on the internet that can do that.
Check that the problem does not be caused by the ROM installed on the Oppo A7n
This part mainly concerns the people who root the Oppo A7n to install a ROM that is not original. If this is actually what you have done, be aware that the unrecognized SIM card problem is quite common after installing new ROMs. We highly recommend that you reinstall an original ROM and re-test it.
If nothing works
If all the above solutions do not work, we recommend you to bring your Oppo A7n and the SIM card back to 1 of your operator’s shops.
