Sony Erricson / W580i Mobile — miscellineous

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The problem of "ciphering is not provided by your operator.Insecure transmission" is because of the network provider not the handset. I am using sony erricson mobiles (T610, K320i, W580i & K550i) all give the same error when I enter punjab. In my home town I don't face this problem. And I am also using airtel from last 5 years, this problem is the same.

So I wanna say this problem is because of network provider not because of handset.

Ciphering is a secure function of all sony erricson mobiles.

i bought asony erricson mobile w580i 1032008 from universal at tata silkform, near nr colony, basavanagudi Bangalore.i make a call or recieve a call on my mobile i alwaus get an alert stating "ciphering is not provided by your operatoe.Insecure transmission", which i never got before when using other mobiles.

I bought a sony erricson mobile w580i at UK last month. When iam using there i found no falty or malfunctioning in my mobile. Last weak i came back to India and using the same mobile, but hear iam receiving a message "ciphering is not provided by your operatoe.Insecure transmission". WHAT IS THIS?
Why iam receiving this message offen when iam speaking? i was seeing this message from the day when i atarted using this mobile in india(Chennai). Also the Mobile started to get Hang while using. Why these malfunctioning is happening.

Please give me a solution asap, why the message is receving "ciphering is not provided by your operatoe.Insecure transmission", also because of this any majour problem will be occur.

Hope i can get solution soon, so that i can be use the mobile with peace of mind.

Thanks,
Satheesh.B.P
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I face this problem since last 6 months.It started when I ebtered for the first time in roaming with this handset.(K 530i).Kindly tell me what must be the problem.Is it a problem with handset or network provider.