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BlackBerry® OS Smartphones

New Contributor
Posts: 2
Registered: ‎05-16-2012
My Device: Curve 8520
My Carrier: Airtel india

SOS signal problem


please help Me!!


My black berry device curve 8520 shows SSO signal while i am inserting SIM card..


I tried with another sim, at that time it shows network connection but Calling Failed !


Kindly request to plz help to solve it .



Posts: 2,372
Registered: ‎07-13-2009
My Device: BlackBerry Z10 smartphone

Re: SOS signal problem

[ Edited ]

Hello Dhaval4Bhatt,

The following article will provide you with more information regarding the SOS signal on your BlackBerry® Curve™ 8520 smartphone:

Network status indicator shows "SOS" on the BlackBerry smartphone - http://www.blackberry.com/btsc/KB03448


We hope this helps.


Thank you.



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New Member
Posts: 1
Registered: ‎08-03-2012
My Device: Blackberry curve 8520
My Carrier: Airtel

Re: SOS signal problem

I am using airtel sim I am having too much problem in my blackberry curve 8520, it shows network connection but Calling Failed ! every time i have to looking my mobile that there is network or not Please Help