Hello, I use OPPOA8, the telecom card can t call in, outgoing calls and sending and receiving text m

Two problems, the first is the card core problem, it is recommended to go to the telecom business hall to change the card.

The second is the problem of the mobile phone, it is recommended to go to the after-sales store to test it to see if it is a problem with the network hardware and settings.

The first method is to use other people's mobile phones to see if their telecom card is normal. Or use their telecom card to insert it into your phone first, and then try to solve some of your problems. If it can be solved, then it means that your problem is in your phone card, not your phone.

The second method is to insert your card into someone else's phone first and see if it can solve some problems with the card. If it shows that it can be solved or there is no problem, it should be that there is a problem with your phone. But there are generally two reasons for this situation in mobile phones, one is that the mobile phone comes, there is a problem in the background, so you can call 10,000 telecommunications, and then go to the manual service to ask if you can, as for your problem, check if there is a problem.

The second is that there is a problem with the mobile phone, and if there is a problem with the mobile phone, it is really a bit troublesome, after all, it needs to be repaired. But the most important thing is that you have to decide whether it is a problem with the test or a problem with the phone. Therefore, it is necessary to verify the method of appeal one by one.

I used to try those methods just now, after all, the current mobile phone, you sometimes have no problem, and it costs money to take it to the repair shop to repair it, maybe no problem, you still spend money in vain.

The failure to send and receive SMS messages is generally caused by the wrong number of the information center, the number is in arrears, the network base station receives ** abnormally, and the mobile phone is faulty. You can refer to the following methods to try to see if the solution is solved:

1. Consult the balance of the mobile phone card to see if there is any arrears;

2. To correct the information center number, first check whether the mobile phone information center number is correct (compare with similar local cards or consult the operator to confirm the message center number);

3. Compare and observe the replacement of SIM cards and different time periods;

4. Backup data restore factory settings attempt;

If none of the above methods can solve your problem, please bring the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.

Here's how to deal with your phone not being able to send text messages:

1. You can change your mobile phone to see if you can send and receive text messages;

2. If you can send and receive text messages, it is recommended that you insert the card into your mobile phone again and send a text message to yourself to check if you can receive it;

3. If not, it is recommended that you check whether there is a problem with the SIM card;

4. Check whether the SMS center number is set correctly;

5. Bring the mobile phone card to the local business hall for testing or replacement of the mobile phone card.

You go to Settings Sound & Vibration to adjust the sound volume to check it out.