Causes and solutions of SIM card failure

This paper will introduce the reasons why SIM card can't be used and the solutions.

Insufficient contact between SIM card and mobile phone.

The contact between the SIM card and the metal contact of the mobile phone is insufficient, and then try to insert the SIM card.

SIM card or mobile phone failure.

If the SIM card is damaged or there is something wrong with the mobile phone, you can change the machine for testing to see if it is the SIM card or the mobile phone.

Signal problem

The current position is a signal blind area or there is no signal suddenly. You can test and pay attention to whether the cell phone signals of other users around you are normal in another place.

Arrears and downtime

If the mobile phone card is in arrears, you can pay the arrears and start the mobile phone.

Abnormal number use

The service is suspended due to the abnormal use of the number, such as the number being used for illegal or illegal activities.

Roaming problem

Only after roaming in Taiwan, Hong Kong and Macao and international roaming are enabled can roaming in Taiwan, Hong Kong and Macao or roaming abroad be used.

Traffic upper limit

When the total traffic generated by surfing the Internet in the current month reaches the package traffic capping value, the system will automatically turn off the Internet access function or speed-limiting network according to the traffic capping rules of your package, and then automatically resume opening next month.