This phone was blazing fast already and with a few mods has become even faster and even then lasts even longer on battery
I have done the following:
1) rooted, twrp, nandroid backup
2) installed franco kernel and purchased FKU
3) decreased animations across the board to 0.50
4) installed xposed followed by greenify,amplify and also purchased a license for cerbrus.
Facing the following issues currently,
1) the camera viewfinder renders images at <30 fps apparently. Loooks very uncools, the images are usable, but definitely not great,more on the average side. This is NOT a point and shoot ala iphone or a M8. If you need good shots,you need tap to focus wait, wait , hold your breath and click. Useless for taking pics of my 11 month old niece.
2) the slow mo videos are complete garbage.
3) again network issues while not too prominent are omnipresent. On the same vodafone 3g network, xperia z2 returned an impressive 5.2 mbps down vs 1.6 mbps down for opo. The test was repeated atleast 5 times at different locations in my home with both phones set to auto network mode and both. Connected to 3g network of vodafone. While I did not actually measure the signal output db,, It was pretty obvious that z2 was getting a better reception. Z2 got toasty after the test while the opo was cool as a sandstone. So perhaps they have reduced thoroughput to improve thermals?
Again should not be an issue for those work in areas with better cellular reception.
4) the size: i finally returned my work sim to my fruit device today, with a deep sigh and picked up my heavy mi powerbank. Wish they will come up with a smaller device next summer.
Great phone, I would easily pick this over most phones in the market,if I am in for a phablet. Its like a nexus 5 but on steroids, and amazingly costs even lesser monies.
But it is definitely a phablet. Not a phone.