Chosen Solution

Blackberry Classic Not able to phone or sms. However it works fine for mails and whatsapp in wifi mode

I would first try your SIM card in a known working phone. I would also try a known working SIM in your blackberry. If you can get SMS and signal on the other phone, then something is wrong with the blackberry.

A blackberry phone? Maybe you can try to shut it down and then turn it on mins later.

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