SAR HEAD Value - Xiaomi Mi A1 Questions & Answers

Hey,
Comments on the fact this phone has a SAR value of 1.75? which is high
thinking of selling it soon.

zobredas said:
Hey,
Comments on the fact this phone has a SAR value of 1.75? which is high
thinking of selling it soon.
Click to expand...
Click to collapse
That' s true that Mi a1 is one with the highest SAR value.
Anyway, take a look to this:
https://www.pcsteps.com/9891-what-is-sar-value-cell-phone-is-it-dangerous/
expecially the chapter "Is a high SAR value dangerous?"
and "Do Chinese phones have a higher SAR value?"

0lorenzo said:
That' s true that Mi a1 is one with the highest SAR value.
Anyway, take a look to this:
https://www.pcsteps.com/9891-what-is-sar-value-cell-phone-is-it-dangerous/
expecially the chapter "Is a high SAR value dangerous?"
and "Do Chinese phones have a higher SAR value?"
Click to expand...
Click to collapse
Great article.
Dispite the unknown about what radiation doest to us, especially phone's, it's definily better to have a lower sar value phone..

zobredas said:
Great article.
Dispite the unknown about what radiation doest to us, especially phone's, it's definily better to have a lower sar value phone..
Click to expand...
Click to collapse
I agree with you, it is bad to unknown the effects of radiation... What if scientists discover that a 1.0 value is deadly and will cause tumor 100%? We are all f***ed
Enjoy life:fingers-crossed:

Related

Note3 has the brightest display ever?

Just saw this:
http://www.androidauthority.com/note-3-display-review-brightness-display-mate-278726/
http://www.displaymate.com/Galaxy_Note3_ShootOut_1.htm
Is this legit or did Samsung give them a super-model for their lab test? I like to believe it, but it sounds a bit of a stretch...
The Note 3’s is extremely bright. According to DisplayMate’s testing, the Note 3 is 55 percent brighter than the Note 2 and 25 percent brighter than the Galaxy S4. The Note 3 performs better than or comparable to “most LCD displays in this size class”. With Automatic Brightness on, the Note 3’s display reaches an impressive 660 cd/m2, which is the highest value that DisplayMate ever recorded. For comparison, the iPhone 5, long considered a standard in display quality, outputs 600 cd/m2.
DisplayMate praises the user selectable color modes of the Note 3, noting that the Professional Photo mode delivers a “fairly accurate calibration to the Adobe RGB standard, which is rarely available in consumers displays”.
The reflectance levels on the Note 3 are very low, which, along with the high brightness, improves readability under intense ambient light. The Note 3 has the highest “Contrast Rating for High Ambient Light” that the company ever measured.
At viewing angles of 30 degrees, the display loses just 22 percent of its brightness, compared to 55 percent or greater in the case of a typical LCD display.
Click to expand...
Click to collapse
Super model huh??
have u bothered reading displaymate review :cyclops:
yahyoh said:
Super model huh??
have u bothered reading displaymate review :cyclops:
Click to expand...
Click to collapse
No.. what do their reviews say?
Sent from my SM-N9005 using xda app-developers app
danieljamie said:
No.. what do their reviews say?
Sent from my SM-N9005 using xda app-developers app
Click to expand...
Click to collapse
http://www.displaymate.com/Galaxy_Note3_ShootOut_1.htm
yahyoh said:
Super model huh??
have u bothered reading displaymate review :cyclops:
Click to expand...
Click to collapse
Do you have something meaningful to say? I'm just wondering how an OLED display can be brighter than an LCD one (by nature of the technology used, LCDs are brighter).
From gsmarena:
The Super AMOLED panel on the Galaxy Note 3 isn't the brightest we've seen and it's inferior to the Galaxy S4 in this department. However in most cases you won't notice this in practice unless you pit the Note 3 side by side with an HTC One or iPhone 5.
Click to expand...
Click to collapse
This seem to contradict Displaymate's review.
MohJee said:
Do you have something meaningful to say? I'm just wondering how an OLED display can be brighter than an LCD one (by nature of the technology used, LCDs are brighter).
From gsmarena:
This seem to contradict Displaymate's review.
Click to expand...
Click to collapse
Not sure where you got that info from. Personally, i'd go for numbers from displaymate over gsmarena.
For reference, Displaymate's Measured Peak Brightness numbers are:
Galaxy SIII: 283 cd/m2
Galaxy Note II: 353 cd/m2
Galaxy S4: 475 cd/m2
iPhone 5: 556 cd/m2
Galaxy Note 3: 660 cd/m2
gsmarena don't have any actual numbers.
skally said:
Not sure where you got that info from. Personally, i'd go for numbers from displaymate over gsmarena.
For reference, Displaymate's Measured Peak Brightness numbers are:
Galaxy SIII: 283 cd/m2
Galaxy Note II: 353 cd/m2
Galaxy S4: 475 cd/m2
iPhone 5: 556 cd/m2
Galaxy Note 3: 660 cd/m2
gsmarena don't have any actual numbers.
Click to expand...
Click to collapse
Actually, they do. It's on page 2. They've put them in a table and everything, so it must be legit, right?
Anyways, I think I figured out the disparity between the two sites. Gsmarena measured brightness at manual brightness setting at 50% and 100% setting. Displaymate measured it on Autobrightness to achieve c660 cd/m2. So, assuming this is correct, Note3 can achieve far higher brightness levels on its Auto brightness than adjusting the brightness manually.
MohJee said:
Anyways, I think I figured out the disparity between the two sites. Gsmarena measured brightness at manual brightness setting at 50% and 100% setting. Displaymate measured it on Autobrightness to achieve c660 cd/m2. So, assuming this is correct, Note3 can achieve far higher brightness levels on its Auto brightness than adjusting the brightness manually.
Click to expand...
Click to collapse
I wonder if they do that so people don't jack up the brightness too far and leave it there and burn out their AMOLED screen too fast. Meanwhile auto-brightness goes into asskicking mode when in bright sun but then comes back down to sustainable levels as soon as possible.
redpill2016 said:
I wonder if they do that so people don't jack up the brightness too far and leave it there and burn out their AMOLED screen too fast. Meanwhile auto-brightness goes into asskicking mode when in bright sun but then comes back down to sustainable levels as soon as possible.
Click to expand...
Click to collapse
This does actually sound like a plausible explanation..
Sent from my SM-N9005 using XDA Premium 4 mobile app
redpiit2016 said:
I wonder if they do that so people don't jack up the brightness too far and leave it there and burn out their AMOLED screen too fast. Meanwhile auto-brightness goes into asskicking mode when in bright sun but then comes back down to sustainable levels as soon as possible.
Click to expand...
Click to collapse
I read that it was set that way so people didn't drain their battery very quickly.
Laptop reviews also has the screen measured as the brightest ever for a mobile device...just saying
MohJee said:
Actually, they do. It's on page 2. They've put them in a table and everything, so it must be legit, right?
Anyways, I think I figured out the disparity between the two sites. Gsmarena measured brightness at manual brightness setting at 50% and 100% setting. Displaymate measured it on Autobrightness to achieve c660 cd/m2. So, assuming this is correct, Note3 can achieve far higher brightness levels on its Auto brightness than adjusting the brightness manually.
Click to expand...
Click to collapse
So you trust GSMarena which don't have tool or experts to do these kind of testings over trusted corporation which main job is optimizing, calibrating, testing, evaluating and comparing all types of displays, monitors, projectors, mobile displays, HDTVs, and all display technologies, such as LCD, OLED, 3D, LED, LCoS, Plasma, DLP and CRT
Cool
I doubt it has the brightest screens of all cellphones out there. The WhiteMagic screen of the Sony Xperia P is over 800nits.
Sent from my HTC One using XDA Premium 4 mobile app
MohJee said:
Actually, they do. It's on page 2. They've put them in a table and everything, so it must be legit, right?
Anyways, I think I figured out the disparity between the two sites. Gsmarena measured brightness at manual brightness setting at 50% and 100% setting. Displaymate measured it on Autobrightness to achieve c660 cd/m2. So, assuming this is correct, Note3 can achieve far higher brightness levels on its Auto brightness than adjusting the brightness manually.
Click to expand...
Click to collapse
That's what I said. They don't have a number for auto brightness, which is the only way to measure max brightness

SAR levels

A few words about SAR. Phone has body 0.62W/kg and head 0.75W/kg SAR levels.
Info from Carl (admin OPO forum) http://forums.oneplus.net/threads/oneplus-one-what-about-s-a-r-levels.821/#post-289699
I had no idea what this was so I googled it.
WHAT IS SAR AND WHAT IS ALL THE FUSS ABOUT?
SAR (specific absorption rate) is an indication of the amount of radiation that is absorbed into a head whilst using a cellular phone, the higher the SAR rating the more radiation that is absorbed into the head.
SPECIFIC ABSORPTION RATE (SAR)
A SAR value is a measure of the maximum energy absorbed by a unit of mass of exposed tissue of a person using a mobile phone, over a given time or more simply the power absorbed per unit mass. SAR values are usually expressed in units of watts per kilogram (W/kg) in either 1g or 10g of tissue.
EXPOSURE LIMITS
In Europe, the European Council Recommendation 519/1999/EC for exposure guidelines has adopted the recommendations made by the International Commission on Non-Ionising Radiation Protection (ICNIRP Guidelines 1998). In the US, the FCC, Federal Communications Commission, sets the radio frequency safety guidelines that all phones must meet before being sold in the US. Current reference standards and limits (status January 2001).
Click to expand...
Click to collapse
I have no idea if this is good or bad? how is it compared to other phones?
I think it's good.
As reference, I looked up the SAR of several phones... Samsung Galaxy SIII i535 (CDMA. VZW) had an overall rating of 1.29 US / 0.88 EU. Note the US and EU measure them differently. The US legal limit is 2.0. The source did not differentiate 'head' or 'body". source: http://sarshield.com/radiation-chart/
They're selling a radiation shield to help prevent exposure and it benefits them to provide lots of information - so take this with a grain of salt. It is very difficult to find comprehensive lists because the manufacturers would rather not have to publish this information. Lots of issues related to radiation exposure potentially causing brain cancer. Kind of like the cigarette manufacturers - smoking didn't cause cancer, no need to worry, nothing to see here, move along.
You make your own choices...

Regulatory notice and SAR values

Has anyone the regulatory notice of the device ? In the quick start guide, it is written that can be downloaded from
the zuk.hk website ...
Or we should find it the menu Settings->About the phone->Regulatory notice, but that menu does not exists ...
Does anyone know the official SAR ratings for body & head ?
I would like to know about the SAR too...
I just got the following informations per email from zuk.hk support :
"Max measured SAR value(body-worn): 0.406w/kg @15mm(10g)
Max measured SAR value(head): 0.305W/kg(10g)
Max reported SAR value on simultanenous transmission: 0.504(10g)"
I am now waiting for the regulatory notice for Europe.
Does someone in the USA have the regulatory notice with the FCC certification. Device should also have an FCC ID in that country.
If you sell a smartphone in EU, you need SAR under 1,5 W/kg.
No metal uniybody means good SAR, like Galaxy S4, S5, Note 3....
It is sure that plastic is better than aluminium (Faraday effect), but there are also phones
made completely with plastic and with high SAR : the Alcatel OneTouch Idol 3 (4.7") has a SAR (EU) of 1.277W/kg (head) and 0.659W/kg (body) ...
*#07# should work to get the SAR of the phone, but it does
Not work

Honor 8 is the Highest SAR value rated phone

Seems that the Electromagnetic radiation emitted by Huawei Honor 8 is 1.5 watt per kg, which is the highest among all smartphones currently.
The rank of high electromagnetic radiation with some other mobiles (from major to minor) are listed below:
1) Huawei Honor 8 is (1.5 watt per kg)
2) iPhone 7 (1.38 watts per kg)
3) Huawei Honor 5C (1.14 watts per kg)
4) Huawei Honor 7 (1.13 watts per kg)
5) iPhone 6S (0.87 watts per kg)
The list with the smartphones that emit less radiation (from minor to major) is the following one:
1. Samsung Galaxy S7 Edge (0.264)
2. Lenovo Moto Z (0.304)
3. OnePlus 3 (0.394)
4. Samsung Galaxy S7 (0.406)
5. Huawei Honor 5X (0.560)
From the list, we can see that Honor 8 is having High SAR rate and honor 5X having Low SAR rate in Honor brands.
Hope so this information will be useful before buying your mobile.
High SAR rate is due that the signal receiving capacity of the device is High.
Source - http://www.phonandroid.com/sante-ondes-quels-smartphones-presentent-das-plus-eleve-plus-faible.html
That's a meaningless set of statistics and the article doesn't give any indication of the methodology.
1) A mobile phone is an RF transmitter, running within a given set of statutorily fixed limits. An iPhone 7 will have broadly the same transmit power as any other. The biggest factor will be network conditions, as the phone ramps down it's transmit power as low as it can, so the worse the path to the cell tower, the more power the phone will use.
2) Watts/kg is a good metric for categorising cyclists, useless for mobile phones, unless you have some very peculiar requirements.
The article linked appears to be discussing the long-discredited health effects of mobile phones. Even if there were anything in it, the type of modern mobile phone would be irrelevant - the difference in transmission paths into the head would be in the order of millimeters and the actual transmission power would be almost identical.
multijoy said:
That's a meaningless set of statistics and the article doesn't give any indication of the methodology.
1) A mobile phone is an RF transmitter, running within a given set of statutorily fixed limits. An iPhone 7 will have broadly the same transmit power as any other. The biggest factor will be network conditions, as the phone ramps down it's transmit power as low as it can, so the worse the path to the cell tower, the more power the phone will use.
2) Watts/kg is a good metric for categorising cyclists, useless for mobile phones, unless you have some very peculiar requirements.
The article linked appears to be discussing the long-discredited health effects of mobile phones. Even if there were anything in it, the type of modern mobile phone would be irrelevant - the difference in transmission paths into the head would be in the order of millimeters and the actual transmission power would be almost identical.
Click to expand...
Click to collapse
Does it mean that if the path to the cell tower is worst, then Honor 8 emits more radiation than others?
And if there is No use with the SAR value, why it is regulated ? Then for what purpose that information is used for?
I pretty much use Google Hangouts over WiFi, I only take incoming text and calls over T-Mo WiFi, which of course isn't available on the Honor 8 yet.
Is this bad then?
jkccl9 said:
Is this bad then?
Click to expand...
Click to collapse
It's how much radiation energy get absorbs into your cranium when you talk on the phone. Or potentially to your balls while the phone is in your pocket.
View attachment 3974626
It depends from the connection type and band used.
In my country we have LTE band 7, according to the doc it's just 0.11
Anyway, it's the best to keep the phone as far from your body(especially important organs) as possible.
eksasol said:
It's how much radiation energy get absorbs into your cranium when you talk on the phone. Or potentially to your balls while the phone is in your pocket.
Click to expand...
Click to collapse
rip
yalokiy said:
It depends from the connection type and band used.
In my country we have LTE band 7, according to the doc it's just 0.11
Anyway, it's the best to keep the phone as further from your body(especially important organs) as possible.
Click to expand...
Click to collapse
Those numbers aren't bad at all for B2, B4, or B12. All of which T-Mobile use. If you're on AT&T, your brain might melt a little bit. B5 and B17 numbers are really high!
Ascertion said:
Those numbers aren't bad at all for B2, B4, or B12. All of which T-Mobile use. If you're on AT&T, your brain might melt a little bit. B5 and B17 numbers are really high!
Click to expand...
Click to collapse
In India JIO uses Band 5.
And I think Indian Honor 6 variant supports only Band 5 sadly.
i cant say that's wrong but i can say since i receive the phone yesterday i cant feel its a value phone with the price i payed !.. even the finger touch into the back feels cheap !..
i am disappointed !
Romiui said:
i cant say that's wrong but i can say since i receive the phone yesterday i cant feel its a value phone with the price i payed !.. even the finger touch into the back feels cheap !..
i am disappointed !
Click to expand...
Click to collapse
Wrong thread. OP has nothing to do how you feel about your phone.
Sent from my FRD-L04 using Tapatalk
This is pretty meaningless:
1. Unless you hold your phone exactly like the official test setup is, your result will be wildly different.
2. The highest level allowed is an order of magnitude than the lowest level thought to pose any possible risk.
Just FYI
Quote
______
United States: the FCC requires that phones sold have a SAR level at or below 1.6 watts per kilogram (W/kg) taken over the volume containing a mass of 1 gram of tissue that is absorbing the most signal.
European Union: CENELEC specify SAR limits within the EU, following IEC standards. For mobile phones, and other such hand-held devices, the SAR limit is 2 W/kg averaged over the 10 g of tissue absorbing the most signal (IEC 62209-1).
India: switched from the EU limits to the US limits for mobile handsets in 2012. Unlike the US, India will not rely solely on SAR measurements provided by manufacturers; random compliance tests are done by a government-run Telecommunication Engineering Center (TEC) SAR Laboratory on handsets and 10% of towers. All handsets must have a hands free mode.[4]
SAR values are heavily dependent on the size of the averaging volume. Without information about the averaging volume used, comparisons between different measurements cannot be made. Thus, the European 10-gram ratings should be compared among themselves, and the American 1-gram ratings should only be compared among themselves.
Unquote
________
So it looks like the Honor 8 SAR ratings are within the limits prescribed in various parts of the world. Equally importantly, as noted above just quoting a SAR number by itself without reference to the method used for measuring it is quite meaningless for comparing one SAR rating with another!
vsriram92 said:
Seems that the Electromagnetic radiation emitted by Huawei Honor 8 is 1.5 watt per kg, which is the highest among all smartphones currently.
The rank of high electromagnetic radiation with some other mobiles (from major to minor) are listed below:
1) Huawei Honor 8 is (1.5 watt per kg)
2) iPhone 7 (1.38 watts per kg)
3) Huawei Honor 5C (1.14 watts per kg)
4) Huawei Honor 7 (1.13 watts per kg)
5) iPhone 6S (0.87 watts per kg)
The list with the smartphones that emit less radiation (from minor to major) is the following one:
1. Samsung Galaxy S7 Edge (0.264)
2. Lenovo Moto Z (0.304)
3. OnePlus 3 (0.394)
4. Samsung Galaxy S7 (0.406)
5. Huawei Honor 5X (0.560)
From the list, we can see that Honor 8 is having High SAR rate and honor 5X having Low SAR rate in Honor brands.
Hope so this information will be useful before buying your mobile.
High SAR rate is due that the signal receiving capacity of the device is High.
Source - http://www.phonandroid.com/sante-ondes-quels-smartphones-presentent-das-plus-eleve-plus-faible.html
Click to expand...
Click to collapse
I guess if use a very heavy case, I can reduce the SAR to a much lower level, or should the weight of the case not be counted?
Romiui said:
i cant say that's wrong but i can say since i receive the phone yesterday i cant feel its a value phone with the price i payed !.. even the finger touch into the back feels cheap !..
i am disappointed !
Click to expand...
Click to collapse
You are paid to say a lot's of bad things about this phone ?! Ok! We all got the point,you dont like the phone,you sold it and thats all. Over!
lejaune said:
I guess if use a very heavy case, I can reduce the SAR to a much lower level, or should the weight of the case not be counted?
Click to expand...
Click to collapse
It might be depending upon the case, As the distance increases between us and phone.

Sar value and slow motion camera

Why sar value of Asus Zenfone max pro m1 is high?is it dangerous?and tips to avoid radiation
And we are expecting slow and fast motion in camera in further updates.whats your state ?
Yeswanth2850 said:
Why sar value of Asus Zenfone max pro m1 is high?is it dangerous?and tips to avoid radiation
And we are expecting slow and fast motion in camera in further updates.whats your state ?
Click to expand...
Click to collapse
I assume you are talking about India. For 601KL model SAR value is 0.549 W/kg (Head) and 1.340 W/kg (Body) which is below the limit of 1.6 W/kg mandated by Department of Telecom, GoI. So i dont know where you got the info that it is high.
Regarding slow/fast motion updates - No idea.
I mean it's high compared to it's competitor phones like redimi note 5 pro and many other smart phones.why is it so?wifi when switched on is not connecting quickly.it must be fixed
Thanks
Regards
A.Sai Yeswanth

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