########## kernel ##########

1. download source tree of android JB from Google.

2. add mediatek folder and makeMtk file.

3. replace kernel,external,system,bootable folders.

4. build kernel by . build/envsetup.sh

choosecombo

Build type choices are: 1. release 2. debug

Which would you like? [1] 1

Which product would you like? [full] full

Variant choices are: 1. user 2. userdebug 3. eng Which would you like? [eng] 3

5. ./makeMtk simcom89_wet_jb2 new kernel uboot

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