Share your experience!
Good evening,
I really appreciate the integration of new features such as flash, reboot, additional options for the sound
but also the additional themes (Black theme animated !!).
I must confess that I encounter very serious problem for the reception 4G update.
I also have big communication problem very often the voice of my party is not at
all audible as if there was no call, sometimes noise may appear and make
communication almost impossible.
I'm 800M antenna and I must say that on another smartphone, not a problem.
The network settings are nevertheless the same. I look forward to the next patch.
I hope we will not have to wait for the android 5.0 for a correction!
My Micro SIM is new ! ( 3 weeks ) so don't try to make me useless manipulations on my phone ...

-103 37asu
and YES before update i've better settings .... really better ... 
Others clients have same problem ...
http://talk.sonymobile.com/t5/Xperia-Z2/Poor-Signal-Sony-Xperia-Z2/m-p/770743#U770743
What 5GHz wireless channels are supported by the Xperia Z2 in France?
36/44/52/60/100/108/132 ?