1.6 is the upper "safe" limit, only if you trust the FCC guidance.
0.5 or less is much less hazardous.
Look at the ratings here. Note that Body SAR amd Head SAR are calculated differently.
https://www.devicespecifications.com/en/model-sar/1ea452d3
More info here
What is the SAR Rating for Mobile Phones?
The SAR rating was first revealed in 1996 when the Federal Communication Commission released specific guidelines on human exposure to cell phone radiation.
They created SAR as a mean of measuring how much RF your body can take when making a call. The outcome of these proceedings was that a person cannot absorb more than 1.6 watts of energy per kilogram of body weight.
This upper limit of specific absorption rate is set well below the level of radiation that would endanger a user’s health. It is the result of intense laboratory testing and it has become a standard for all smartphone manufacturers.
The highest SAR was also set relative to the heat produced by RF radiation, and it has nothing to do with its possible side effects for your health, such as cancer or brain damage.
In other words, the SAR specification on a phone can only tell you the highest measurement taken for each frequency reached by the device, and not how much radiation you absorb.
What is a Safe SAR?
Undoubtedly, the safest cell phone that you can use is the one with the lowest SAR. All manufacturers of mobile devices are required by the FCC to meet RF standards and mention the specific absorption rate to consumers.
Most experts consider a safe SAR to be anywhere between 0.10 and 0.50.
In fact, several manufacturers like Samsung and LG try to stay within these limits for every model they release.
At the other end, companies like Huawei, Nokia, and Xiaomi consider the maximum SAR limit of 1.6 as a starting benchmark for their standards, and one from which they rarely stray away.
If you are in the market for a new smartphone from one of the top leading brands like Apple or Samsung, you might want to check the SAR ratings before you purchase one.
https://emfadvice.com/sar-ratings-radiation-levels-smartphones/