I have been using it past 7 years, thinking that it might up grade their features but I was wrong. The quality of this operator in remote area is very bad.
You will not get signals in remote area. Internet quality is poor. You wait for the server to come and it keep buffering for so long that ultimately I have to turn it off and then restart. The recharges are costly.
All other companies are giving huge in this price that docomo is not giving. I am very disappointed with this and now going to Port my number.