Lenovo S720 how to display card 2 is not installed

We apologize for the inconvenience caused.

If your device card slot 2 does not recognize the SIM card, we recommend that you perform the following steps to try to solve the problem:

1.Your device card slot 2 supports 2G cards of mobile operators and 2G cards of China Unicom operators, it is recommended that you check whether the SIM card can be used here;

2.If the SIM card is not in good contact, it is recommended that you turn off the SIM card and try to re-insert it to see if it can be used normally.

3.If the SIM card itself is abnormal or compatible, it is recommended that you use other SIM cards for comparison, if other SIM cards can be recognized, it is recommended that you contact the operator for card replacement or other operations;

4.If the above operations cannot identify or improve the problem, please back up the fuselage data and restore it to factory settings.

If the problem still cannot be effectively solved, it cannot be ruled out that it is caused by the failure of components such as the body card slot or radio frequency, we recommend that you take the time to go to a nearby Lenovo authorized repair station for specific testing and treatment.

Lenovo authorized repair site inquiry.

The business hours of the maintenance site are usually from Monday to Sunday from 9:00 to 18:00, except for holidays, and the stations will be slightly adjusted according to their own operations.

Dear Lenovo users, hello!

If your problem is not solved, you can complain, put forward your valuable opinions, and then transfer to manual service.

Is it the phone or the clumsy in the file can not see how big.

File management and app installation.

If you still have relevant doubts, it is recommended that you contact Lenovo authorized maintenance sites in time, and hand them over to engineers for testing and maintenance, and you can visit and inquire about the nearest site. The maintenance station is usually open from Monday to Sunday from 9:00 a.m. to 6:00 p.m

00, except for holidays, the local sites will be slightly adjusted according to their own operations, it is recommended that you can call for detailed consultation when you go, please refer to it.

We apologize for the inconvenience.

Lenovo S720 supports mobile cards and Unicom cards. If you confirm that you have inserted the SIM card of the above range in the correct card slot, and there is no service problem, we recommend that you follow the steps below to troubleshoot:

a.No signal or service under all environmental conditions:

1.The mobile Unicom card you consulted can be recognized and used normally in both card slots, please re-insert or replace the observation, if it can be improved after replacement, it is recommended that you send it to the repair site Qingheng in time, and the card slot is abnormal;

3.If the replacement SIM card is still in good condition and is blocked in the state of no signal and service, it is recommended that you send it to the repair station in time for processing;

b.Intermittent occurrence:

1.The mobile Unicom card you consulted can be recognized and used normally in both card slots, please re-insert or replace the observation, if it can be improved after replacement, it is recommended that you send it to the repair site in time, and the abnormal card slot is not ruled out;

2.Whether the surrounding network environment is normal at that time, it is recommended that you go to other regions for comparison, or make a simple comparison with nearby users.

3.It is recommended that you change the SIM card for comparison, if the individual SIM card appears, it is recommended that you contact the operator for further processing;

4.If it occurs recently, it is recommended that you back up the fuselage data for factory reset and try to observe;

5.If the above operations cannot be improved, please send them to the repair site for testing and processing in time.

Lenovo authorized after-sales site inquiry.

My mobile phone also has a bad signal, I don't know how to install the signal on the mobile card and the Unicom card, and there is a signal in exchange for it, which is a poor signal!

It's not installed, right, turn it off and try again.

The signal is not good or the card is not installed.

Dear Lenovo users, hello!

Dear Lenovo users, hello!

1.Turn it off, take out the SIM card, use the eraser to clean the contacts, and reinsert it to check whether the phone recognizes it.

2.Change to other types of SIM cards and check if the phone recognizes 3It is possible that the local network parameters do not support the mobile phone network frequency, try to change to another location, if it can't be solved, please go to a nearby service station for repair.

If the file type is incorrect, it should be that the system process is prohibited, and it is recommended that the landlord restore the factory settings.

This may be a broken card. Try it with a card reader and connect it to a computer, and if it doesn't work, it's gone.

Dear Lenovo users, hello!