How to insert pictures and contacts when editing and replying to oppo SMS?

Click the paper clip on the left side of the input box used to input the short message content, and you can select the attachment to send.

Method for comparing differences of cell phone signals

As we all know, it is meaningful to compare the differences between two things under the same conditions; Similarly, to compare the signal difference between two mobile phones, it must be done under the same conditions.

Cell phone signal comparison premise

1, the same type of SIM card: for example, there are both mobile cards and Unicom cards.

2, the same network standard: for example, all under the 4G network, all under the 2G network.

3. Same location: This includes the location of the base station and the location of the cell. This situation can only be checked in a special way.

Meet the above three conditions, enter the settings-about mobile phone-SIM card state, check the signal strength value, and compare the numerical differences between the two mobile phones. If the absolute difference is within 10dBm, it is normal. Of course, the signal strength of different models and brands will vary. If you feel that the cell phone signal is abnormal, you can send it directly to the service center for testing.