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July 20, 2010

The Death Grip Test on Antenna Signal

Steve Jobs said all smartphones have this problem — hold it in a certain way and your phone signal goes down. Was curious so I wanted to try this one several of the phones I have here – the Galaxy S, Xperia X10 and Desire.

So I tried holding these 3 phones in every possible way to see if I could somehow affect the signal strength.

Fortunately, all the 3 Android phones have this built-in “Signal Strength” monitor which is measured in -dBm (an abbreviation for the power ratio in decibels). If you have an Android phone, you can see this by going to Settings -> Status -> Signal Strength.

The typical range of wireless received signal power over a network is somewhere between −60 to −80dBm which has a power of 10 pico-watts to 1,000 pico-watts. So as you can see, the phones we have below are in the -80dBM range.

We started out with the Samsung Galaxy S i9000 at -81dBm. When you clasp your hand at the bottom back part of the phone, the signal drops to -97dBm. Holding it just on the side did not affect the signal, just the back part (below the battery compartment)

Next one is the Sony Ericsson Xperia X10 which started out around -87dBm. It drops slightly to -93dBm if you clasp the bottom back end of the phone, just like the Galaxy S above.

With the HTC Desire, I could get a nice -75dBM signal hands-free but can easily drop it to -103dBm when you clasp the phone with both hands tightly — and bringing down the signal bar from 3/4 to 2/4.

So it’s really true that holding a phone in some way will affect its signal strength though it may vary from phone to phone.

Updated: Here’s a closer shot of the signal loss on the HTC Desire and Xperia X10:

Written by yuga

Abe is the founder and publisher of YugaTech. You Can follow him on Twitter @abeolandres.

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112 Responses to “The Death Grip Test on Antenna Signal”

  1. Arvee
    Twitter:
    says:

    HAHAHAHAHAHAHAHA can’t help but LOL

  2. salad says:

    ANDROID RULES! IPHONE SUCKS! IFOOL=FOOLS! DROIDS=COOL! STEVE JOBS=MAMATAY KA NA SANA

    “SALAD WOOOH, INIT PA” LOL!

  3. Arvee
    Twitter:
    says:

    ^Grabe ka naman para ipagdasal na mamatay si Steve Jobs!

    Pero kung bumili din siguro ako ng iPhone 4, baka ako pa pumatay sakanya hahahaha just kidding! Baka mamaya may cyberpolice dito. Iba ang powers ni Jobs!

  4. android_fanboi says:

    apple and iphone haters = sucks!
    android lovers = winner!

    reality bits:

    According to Goldman Sachs, Apple makes more profit from mobile phone sales than the entire rest of the industry combined.

    Update: Actually, it doesn’t appear to be the entire industry — just RIM, Motorola, Nokia, HTC, and Sony Ericsson. So the list doesn’t include Samsung and LG. But still: striking.

    via Daring Fireball . net
    http://www.businessinsider.com/you-cant-appreciate-how-completely-apple-has-humiliated-rim-nokia-and-the-rest-of-the-gadget-industry-until-you-see-these-charts-2010-7

  5. royguadz says:

    I think more than the drop in signal strength; the issue really is the number of drop call(s) experienced with the phone.

    In the US, AT&T has been largely blamed for the frequent signal loss and drop calls experience with the iPhone but with the recent developments, it seems the phone itself is also partially to blame.

  6. MrOrange says:

    actually haven’t seen the pics. blocked sa office namin kasi.

    But I personally tried this on our ericsosn phones and well…

    the Xperia X1 dropped 2-3 bars from full and took 5 seconds to gain it again, but yes quite awkward to hold a phone clasped in that way.

    Tried another phone to see if smartphone lang affected. a P800, no issue and a friend’s W580i, no issue as well.

  7. Myke says:

    as if you’ll hold your cellphone using a tight or closed grip. . .the death grip may loose some signal strength on other cellphones, but it will not lead to dropped calls like the iphone4. Apple’s reasoning behind the signal loss on their latest product is a joke. . .napaka-lame at nakakaasar na. . .better stick to laptop and desktop production steve. . .

  8. [...] the iPhone 4 is the antenna reception. I’ve previously tested several smartphones (see here) regarding the drop signal strengths and they all behaved the same although at a slightly varying [...]

  9. Neil says:

    I am not interested with the signals, I just want to comment dun sa steve jobs ba yun na all signals drop I own samsung omnia II and BB bold 9700, I tried holding them both in every possible way I can, haven’t experience signal drop down even 1 bar, probably gone down if there were signal testers but I did not lose a bar in every possible way. Except, when I sandwiched the omnia II with my palms (which you wouldn’t encounter on a normal usage of the phone) I lost 2 bars. You lose the signal on Iphone when holding it normally compare to other phones you lose signal only when you sandwich it like crazy with your palms. For me what you pay for I phone – 1. Lots of applications 2. The cool apple logo behind the unit 3. The resale value which 4. The fact that you want to be showy and cool just because you own a cellphone worth more than 40k pesos. :D

  10. [...] did a quick test of that here last year which included the Xperia X10, Galaxy S and HTC [...]

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