DoCoMo is very advanced in it voice thinking.....

They made the jump from SMartphone to the Smartlife. 

Do they treat all Japanese OEMs the same?

No they do not....


In response, we introduced a new policy for the spring 2013 models, which were announced in January. We decided to concentrate our resources on the development and sale of strategic models, and we chose the Sony XperiaTMZ as our recommended smartphone. We continued this policy for the summer models, which were launched in May 2013. At that time, we positioned the Samsung Galaxy S4 and the Sony XperiaTMA as our Top Two models. By changing the direction of our sales strategy, we are aiming to present the key models and their special features in an effective and focused manner. Also, by streamlining our lineup, we are striving to foster enhanced competition among handset manufacturers and to reduce procurement costs.

i dont think that has changed.