iPhone and blackberry

Thanks to M1 multiple SIM, I can own two handsets with one mobile number and riding on 1 data plan. Does this mean that I can max out my plan and be a smart customer for once? We shall see,.., As a matter of fact, while I am excited and blogging about the multiple SIM, the 2nd SIM is current not working as expected, so I have to check with M1 tomorrow. Hopefully, I am not over promised and under delivered.