I used someone else's mobile phone to get a Huimin card, but I can't find the information in my own hand.

Look at the mobile phone model network. Some mobile phones can put Unicom or mobile or telecom cards, but not necessarily three networks.

There are three possibilities for this

1, the card itself.

If the SIM card itself is not cut well, the edge will be jagged or bent, which will lead to poor contact. This requires smoothing the edges of the card. The bent part is flattened, and then reloaded into the card slot.

If it is not the card itself, please proceed to the second step.

2. Poor contact between SIM card and card slot due to falling of mobile phone or other reasons.

At this time, it is necessary to artificially increase the thickness of the SIM card. You can go to the mobile phone beauty shop and ask the mobile phone beauty master to put a film on the plastic part of the SIM card to increase the thickness of the SIM card. It is best not to need too thick film, which can solve the problem of poor contact.

3. Software problems.

Due to Android system problems and some software bugs, the mobile phone card cannot be detected. It is obvious that the mobile phone card is installed, but it is indicated that it cannot be found. At this time, the software should be upgraded in time to reduce this situation. After all, the mobile phone card can't be detected from time to time, which is very delaying.

In addition to the above factors, it is also an important measure to avoid the phone falling off. Some friends just accidentally dropped their mobile phones once, and then the SIM card began to "disappear" and could not be found.