Wtf. 680! What currency is that? Hong kong dollar?

if i clear cache,all my data and files wont go missing right?

I know where's the cache,but where's the dalvik?so that means aokp has their own kernel?

Yup,the battery life very nice,but if you reach around 10%,it will shut down

guys,is there any zip link for stock ROM nexus 7 android 4.2.1?

Oic. Use telco covrage 4 internet. I already got pstppaid u mobile sim. Rm28 a month with 1gb data intenet + free sms mms. If i put this sim on n7, i cant send sms or receiv it?

You can receive and send SMS using nexus7c. Currently I'm using go SMS to do it. I'm using Umobile prepaid

yup will do that 
root it! dont care what negative things ppl say about rooting. coz i regretted for not rooting my N7 earlier thus cannot make a full backup in case of emergency 

Here's some clarification regarding bootloader, kernel and rom. Hope it sheds some light.

Bootloader - the frontline code that get executed when you turn on any android device. It contains instructions to boot system kernel. Every bootloader is unique to every devices. Some may contain advanced options to mod or debug. It also serves as a checkpoint between partition, therefore that's why bootloaders are "locked" to restrict access to said partitions.

Kernel - the middle man between software and hardware. For anything, ANYTHING that you want doing on Android ( or all other popular OS ), kernel is involved. It translate hardware input to software, and translating it back for results.
Example : Waking screen.
Hardware input : Power button pressed -> Kernel: Trigger OS -> OS: Power button pushed, turning on screen -> Kernel : Send trigger to display digitizer -> Hardware : Voila, screen wakes

It effects all hardware aspects, brightness, digitizer, processor, memory, OTG controller etc. Hence why a well-written kernel can deliver high performance with minimal battery drain.

ROM - Your device operating system. How your devices ultimately look and work depends on them. TabletUI, PhabletUI, bloatware, adblocking are all ROM controlled. ROM cooks ( aka ROM developers ) also optimizing their ROMs by determinating which app should sit in memory, deodex / odex apk, and clearing out bloatware from stock ROMs.

Additional read :
Bootloader
Kernel
Recovery Mode
ROM

Still I can't find the kernel,would appreciate if you give me the link directly

Guys,will this zip work if I wanna flash back to stock kernel? http://forum.xda-developers.com/showthread.php?t=1997474

Guys i wanna ask, is it possible for me to make phone calls if i download a contact app (e.g Go Contacts) and get a Bluetooth headset?

Guys, there's no safely remove usb drive when Nexus 7 is plugged onto our PC. So u guys juz cabut the cable? XD
Or is there a specific and correct way of doing it? I scare anything happen to my Nexus 7's micro usb port or my laptop's usb port. @@

Although I don't own a Nexus 7 (yet), but I believe it's pretty standard to allow your new device to have a full charge of 8 hours before using it.

From where and where the download file is located?

I just found that it goes to download folder,but there's only copy option,no cut

HELP!I was stuck on the x logo now

I didn't do backup and reinstall my old Franco kernel,was lucky enough to get reboot

I don't use TWRP,I use CWM only

So if I restore the file,the 2gb will be refunded to me also right?