Mobile phones are the most common sources of radiofrequency electromagnetic field (RFEMF). The rapid increase in their number and global use have made them a relevant subject of scientific research. Therefore, the purpose of the study was to measure the RFEMF levels from mobile phones in the environment in order to find out the adherence to reference levels for the population and establish the dependence on distance, mobile phone model and operating mode. The radiation level in the environment was assessed by the value of the surface density of the energy flow using the Gigahertz Solutions HFE35C electrosmog analyzer. The analysis of adherence to reference levels for the general population showed that:

• in the “mobile connection” operating mode, the studied mobile phones did not create RFEMF above the permissible levels set by national and international regulations;
• in the “mobile Internet” operating mode, the level of radiation at zero distance from the mobile phone was higher than the permissible one set by state sanitary standards (100 μW/cm²) in half of the samples;
• in the “mobile Internet” operating mode, at a distance of 1 m or more, RFEMF levels from all phones were lower than the permissible one.

Levels of RFEMF from mobile phones in the environment:

• are different from different phone models;
• are significantly lower in the activated mobile connection mode than in the “mobile Internet” mode;
• do not change significantly with distance in the mode of activated mobile connection;
• are by an order higher at zero distance in the “mobile Internet” mode, and at a distance of 1 m reach the levels of the activated mobile connection mode;
• are significantly different in different phone models at zero distance in the “mobile Internet” mode;
• have the lowest values in both modes for the following phone models: Apple iPhone 13 Pro Max, Apple iPhone 11 Pro, Xiaomi Redmi Note 8;
• require further multifactorial research