Samsung Electronics has shipped out to India for testing purposes a device that goes by the model number Samsung GT-I9405 in the Zauba’s import / export data entry logs.
The Zauba data entry logs touts Samsung GT-I9405 as a mobile phone for testing and evaluation purposes, but not for retail sale. It also mention that the smartphone comes with a 5.5-inch display and that it is a single SIM model.
Samsung is rumored to launch a new premium metal-made range this year, called the Galaxy F series, besides the Galaxy S5. At this point we cannot link GT-I9400 / GT-I9405 (likely LTE model) to either Galaxy S5 or the all new Galaxy F series as the information is pretty scarce.