Have received upto 4 calls per day including weekends from an 02 numbers beginning with 72750” and last 4 digits of 9711, 9674, 9675, 9658, 9672, 9673, 9709, 9712, 9657 and 9658 since 16 September. The first call I answered and the male Indian voice told me that I was interest in some shares because he could see that I had open a trading account. I told him that I had not opened any such account and that I was not interested in anything he had to say further and told him not to ring my number again. Just sharing to let anyone else know should they also be pestered by this scam.. obviously his real phone number is masked with these bogus unassigned phone numbers.