Sergio Delle Vedove/iStock Editorial via Getty Images Investors can be forgiven if they hear about Nippon Telegraph And Telephone Corporation (OTCPK:NTTYY) and think it is an obsolete company not worth their time researching. While it's true that it is perhaps time to drop the word "Telegraph" from its name, and perhaps "Telephone" too while they are it, this is a company that is far from obsolete. It owns one of the leading mobile operators in the world, with excellent 5G coverage, and it is one of the mos ...