Rakuten Mobile will finally launch its first commercial 4G services on April 8, with an unlimited data plan priced at around $28 a month (though only within the company’s somewhat limited footprint – when roaming, users are capped at 2GB a month). The company has its eyes on markets beyond its own direct mobile base however. Like a select group of operators before it, such as SK Telecom of South Korea, it believes it can take its experience of integrating and deploying a radical new architecture to the wider MNO community, in a mixture of contributions to open platforms, and revenue-generating services. CTO Tareq Amin thinks Rakuten has unique experience which is of high interest to others. It has rolled…