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Old 06-02-2010, 08:20 AM   #1 (permalink)
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Default Phone shows SOS at the gym

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I have a weird issue with my phone with I never seemed to notice before until recently. I am not sure if this occurred since I owned a BlackBerry, but sometimes at the gym, my phone goes from 1 bar to SOS immediately once I'm in the locker room. If I move around it can change from SOS back to 1 bar again.

But when I leave the gym to make my calls home it will stay at SOS until I either turn off the radio/back on again, or wait a long time.

Any idea why the phone just goes into SOS. I thought it was a battery saving feature after leaving the phone in a low to no signal area for a long time but when I looked at my phone before placing it in my locker, it already said SOS!
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Old 06-02-2010, 08:27 AM   #2 (permalink)
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It goes to SOS because of the lack of signal. No connection.
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Old 06-02-2010, 08:35 AM   #3 (permalink)
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Yeah, but I've seen it have an X or other symbol for no service, iirc in the past. I never seen it use SOS for no signal. Is it implying there is enough signal to make a call to 911 if it was needed?

Only time I saw it do SOS was when I forgot to put the SIM card into the phone.
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Old 06-02-2010, 08:57 AM   #4 (permalink)
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[quote=jweinraub;1613806]Yeah, but I've seen it have an X or other symbol for no service, iirc in the past. I never seen it use SOS for no signal. Is it implying there is enough signal to make a call to 911 if it was needed?

Only time I saw it do SOS was when I forgot to put the SIM card into the phone.[/QUOT


SOS means you are out of AT&T coverage but there is another carrier with a compatible GSM frequency (but does not allow roaming). In other words your SOS was probably there because of a Tmobile signal. SOS is part of the GSM standard and allows you to make an emergency 911 call even of the carrier does not have a roaming agreement.

From AT&T site:
"SOS" indicates that the device is outside of the AT&T wireless coverage area and is in an area where AT&T does not have a roaming agreement..."
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Old 06-02-2010, 09:09 AM   #5 (permalink)
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Oh - so being inside a building, it is possible they have their own network -like those nextel repeaters or something?

I actually thought it was some kind of dampening device since they don't want people using a cell phone in a gym.

Thanks for answering my curiosity!
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Old 06-02-2010, 09:40 AM   #6 (permalink)
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Wirelessly posted

I suspect it is just a matter of the other carrier's signal penetrating the building better than your carrier's signal. And sometimes in a situation like that you can go in and out of signal reception just moving around in the space of a few feet.
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