The signal problem of iPhone has been criticized by users. In order to solve the problem of iPhone signal, Apple upgraded the baseband of iPhone 15 this year from Qualcomm X65 of iPhone 14 to X70.
According to reports, the X70 supports all 5G commercial frequency bands from 600MHz to 41GHz, with a peak downlink rate of 10Gbps and an uplink rate of 3.5Gbps. Compared with the iPhone 14, the 5G speed of the iPhone 15 equipped with Qualcomm X70 baseband is improved. 24%.
I thought that after the iPhone 15 used the Qualcomm X70 baseband, the signal would always be online, but the result was still unsatisfactory: the iPhone 15 would still display "No SIM card", "No SIM card installed" or "Searching the web" and other warnings.
What should you do when Apple iPhone 15 displays warnings such as “No SIM card”, “No SIM card installed” or “Searching for the network”?
If the above prompt appears on Apple iPhone 15, you can try to solve it by referring to the following methods:
1: First of all, you must determine whether it is in arrears. If it is in arrears, it will definitely not be able to be used normally. After all, we do not have money ability.
Second: If it is confirmed that there is no arrears, you can try to restart the iPhone.
Three: Then go to "Settings" → "General" → "About This Mac" to check whether the operator requires an update. If an update is required, you will receive an update prompt. Please update again. See if it can be used normally.
Four: If it still doesn’t work, you can try to take out the SIM card, gently wipe the metal surface, and then reinsert the SIM card to make sure that the SIM card tray is fully closed and not loose.
Five: If none of the above methods can solve the problem, you can try to use another SIM card, because it is very likely that your SIM card has broken accidentally.