Viettel sim has waves but cannot call, causes and ways to overcome

Many Viettel subscribers encounter a situation where the sim has normal waves but cannot be called. Calling to the switchboard is also a difficult thing. This makes many people feel extremely confusing and do not know what problems my sim is having. If you are also in the same situation and do not know how to fix Viettel sim, the error cannot be called, please refer to the following article to understand the reason and quickly correct the error so that the sim works again normally.

1. The cause of Viettel sim is locked and unlocked
2. How to change SIM 4G Viettel at home, only 30 seconds, free, can exchange
3. How to chat with Viettel operator

Why does Viettel sim have waves but can't call?

In fact, there are many reasons why your Viettel sim does not call, including subjective and objective factors affecting. Here are some of the main reasons for this situation:

Firstly, if Viettel sim does not call, it is possible that your sim has been blocked by the switchboard because it has not paid the charges on time (for postpaid subscribers), or prepaid accounts with overdue deposits. phone.

Secondly, during use you may accidentally turn on outbound call blocking without knowing it. Therefore, no matter how strong a Viettel sim is, it cannot be called.

Thirdly, the case of newly purchased Viettel sim can not be called because you have not activated mobile phone sim. If that is the case, even if the phone has a sim, there is still no successful call.

In addition to the three main reasons mentioned above, there are many other causes leading to the situation that Viettel sim does not receive calls, such as due to conflict of applications installed on the phone, your phone has a hardware failure, turns on incoming call blocking mode, .

How to fix Viettel sim can not be called

For each cause, there are different remedies, you need to determine exactly why sim Viettel can not call and apply in the following ways to quickly handle Viettel sim error without calling even with the wave.

In case 1, if Viettel sim is not able to call because it is locked 1 way, 2 way, you need to check your account balance, phone fee and recharge your phone account, or pay the full fee.

In case 2, for Viettel sim cards that cannot be called because of setting up the outgoing call mode, please reset the settings on the phone to make sure the subscriber is operating normally.

In case 3, when you determine the cause of the newly purchased sim Viettel can not be called because it has not been activated, at this time you just need to contact the Viettel operator and ask them to activate the sim.

Besides, with application conflict error, you have to turn off, remove those applications, or bring them to reputable repair shops to check and repair if your Viettel sim causes do not call It is due to a hardware failure.

The status of Viettel sim does not call, it will affect the communication, as well as cause many problems and unnecessary problems for mobile subscribers. Therefore, you should pay attention during the use process properly.

Good luck!

See more:

1. How to check phone, SIM Viettel, current position supports 4G or not
2. How to register Viettel waiting music
3. What is Viettel Sim Internet? Offers of Viettel Internet sim