[Q] Really need help understanding this one! topic

Hi!

Brand new to the group so I thought I'd say hi and ask this question.

You see, I have this problem with my SM-N910 (Galaxy Note 4 for N.A.) That I'd recently purchased here in Canada. Works just fine until suddenly, problems popped up. so I thought doing a factory reset would help solve the problem. Only to realize that, it made it somewhat worst. Because it went to being a Note 4 for Canada (N910) to a Note 4 for China (N9100), Plus it didn't help that now the Boot-Up screen went from showing that it's a "Samsung Galaxy Note 4 powered by Android" with Samsung logo showing up afterwards, to just "Android", with the Android logo showing up afterwards. Is there anyway of fixing this? Any and all advice would be definitely appreciated! Thanks in return! :)

[Q] understanding fast charge topic

hi all, I try to understand fast charge algorithm of stock jb sony xperia ion. I have a bench type, volts and amps adjustable power supply. when I test charging with data wires shorted usb cable (fast charge mode), its about 1.35 amps at 5 volts. But however original sony ac wall charger is faster than this constant voltage method.
So, I guess there is something beyond shorting data wires for fast charge...
How can we push more than 1.35 amps without ori ac wall charger? Any ideas are welcome. thanx! :)


P.S: if I use a regular usb cable (data wires not shorted), phone draws only 0.46 amps at 5 volts.