Well, not a single person in my town and workplace knows about Fiio. Everyone knows about LG and Sony of course. That means Fiio is still a very unknown company.
At this point, it's not worth investing on Fiio, iBasso, iRiver, Hifiman again. They've been good at draining people's wallets but not a single device from them sounds better than Teac UD-H01 Reference DAC / Audio Interface which costs $140. If you can't believe, try Teac UD-H01 by yourself. It has the same sound stage and instrument separation as Benchmark DAC2 at only 10% of its cost.
How did I compared them? I compared their sound stage width, detail, instrument separation, clarity and musicality. V10 sounds much better than HM901 which is more expensive and less efficient than V10.
Wait for Samsung S7 then. It's going to feature the same ESS Sabre DAC chip. It will be released in few months.
U.S. version V10 has a sim card slot which you can put a sim card from your provider.
If your head is full of doubts, buy an AK380 and its amp module for total $4,000 and not listen to anything else again. Maybe buying a Hifiman's HE-1000 for $3,000 will help you with that too.