Hello,
Which bitcoin is the best for trading with my iphone on the go, next few weeks i will travel alot and only have my phone available, which exchange is the best to use ?
Since you have an idea about what exchanges to use,I'd recommend you a few exchanges NOT to use while trading from the phone
1.YoBit,not only it's terrible UI but they're on the verge of becoming next Gox exchange.Remove your coins if you have anything there.
2.BTCfx,don't download it ,multiple scam accusations were made for immediate disappearing of the coins.
3.BitStamp ,better than previous apps ,I had bad experience when I lost the PIN ,they labelled as my account being hacked and never got any refunds.
You can use Poloneix or Kraken,not because they're super great compared to others but they have quite nice support and back-ups.