Do remember that the smartphones bought under such combo plans may be locked for a particular telecom service provider. You may not be able to use the device with any other telecom service. Please note that I have not used any such combo offers so far and the statement above is only my assumption. I would advise the prospective buyers to check out the same before actually buying the phones.
Moreover, these plans come with several terms and conditions. There is a fair usage policy applied to these offers. Consumers are requested to check out the conditions in fine print for proper guidance. As for the free calls under the plan you mentioned, your free calls are limited to only 100 unique numbers per week.
Live....and Let Live!