[Nexus 5 Q&A, Help & Troubleshooting] netant:
With a heavy heart i have to keep my SEx1 aside and have entered to Android Ecosystem.

I'm a customized freak & made my X1 ROM super stable with my super minimalistic custom rom's, im still going to use that as my primary portable music gear, but for rest of the things Google Nexus 5 is the new companion.

Kitkat is whole new world for me, used gingerbread a a little bit but both are poles apart. hence need some suggestion to keep myself educated with latest trends and tech. Please ignore my noobe-tagged question. So here i start:

No Lollipop ? ?

As broadcasted nexus devices should be the first one to get Android 5.0, Lollipop.

Im yet to get any update & currently running 4.4.4. Any words on when could i expect Lollipop upgrade in my device.

[I don't want to root/ flash until my device is out of warranty].

Contact Backup & Google sync:

a) When starting the device for first time, it prompted me to use google account credential, i did, and it dumped all thousands of my gmail contact in phonebook. Too bad. i have manually deleted all of them from phonebook. and switched-off auto sync.

b) it refused to sync my contact form X1, which was back uped in outlook under win7. Found an alternative, transfered all my contact via bluetooth to nexus 5 and imported them one-by-one. Again when importing in batches, it gives error, which is kind of helpful for me. I only imported selected contact and not the obsolete 8 yrs old contacts:)

Now the question

: How my Sync my contacts without downloading email-contact from gmail. Another gmail account doesn't seems to be ideal as i use email, calendar, drive from this mail. Please suggest.

Customization:

a) I like to keep my phone at minimals. used mycolorscreen- Themer for few days, which let me customize to what i want till great extent. but its getting corrupt by it own at random times, spoiling my widgets location & functionalities and sometime replacing wallpaper with "black" and have uninstalled it now.

Do we have anything similar to HTC / touchflow full screen animated weather for android? roa any alternative to themer which let me customize N5?

b) Lockscreen customization like changing the background according to themer wallpaper and add few information like battery level, weather, etc. I goggled DashClock please let me know what you guys think about it or any other recommendation.

Few App recommendation

Fitness tracker : currently using Pedometer by j4velin, which is good, but it doesn't give me much control, no difference in distance covered if you running or walking, no actual track of distance covered as it derived from the stride length we enter in the setting. Any recommendation in this please ? should i try Google fit app ?

Pulse Light Controller N5 seriously missing "things" in this department, apart from default white glow of unleaded sms, i never noticed any other indication. they should have provided a notification for low-battery and missed call. Currently using Light Flow but i hate its presence always in my notification area. what's XDA's thoughts in this please? I dont need anything with bells and whistles, just a minimal app which show me red light when my battery is low & some other-then-white-color from unreaded SMS & missed calls.

Vibrate on call connect Got ExDailer but im clueless how to make it the default dialer. Also i liked the stock dialer is there any way to make it vibrate when a call connects, i have to install 3rd party app on my phone :(

Cache cleaner

as im playing installing, uninstalling lots of stuffs these in these experimenal days what would be a recommended app for this, if its mandatory. have used this bloatware Clean Master in my X10i earlier which killed the phone in multiple ways. any other recommendation please, i just want to clean junk files and do not want any antivirus and gold plating.

Thanks in advance.