Most banks and financial institutions want people to use mobile phones for transactions , but mobile phones are extremely unreliable and can be easily hacked.
In the last few months at least 2 Nokia phones including a new Nokia C6 have become dead after receiving a phone call. The Android based Dell XCD 28 is even more unreliable, automatically making calls costing Rs 0.30 on its own.
I am facing this problem mainly with the one mobile number that is published publicly and it appears that many others are facing the problem.