Finally I bought Xperia ZR for the sake of smartphone needs. Then I end up carrying both phones. Though there is a simcard converter still I'm not comfortable using changing SIMS. So now I only use Xperia ZR which is terrible battery for a adventurer like me. But for smartphones it has acceptable battery life. Stamina mode doesn't help as I'm a person who turn on extra feature when I want only and other than voice call the phone is in stand by..
The phone consuming more battery in standby time is simply unacceptable for me. Also I don't need the gorgeous screen to suck battery when sending SMS or reading a PDF.
So after hearing about Ultra Power Saving mode on samsung I'm planning to have a look. I need advice from S5 owners here.. After the charge If I switch on the Ultra Power Saving mode how long the phone last? Will it last a week assuming I will keep the Ultra Power Saving mode from full charge to empty? using only for calls and message.
FYI with call and message my xperia ZR last for 2.5 days
thanks in advance