Physical Acquisition of an Android Mobile Phone

Dear All,
I'm new to mobile forensics and I'm trying some tecniques to get physical image of my android
mobile phone (Vodafone Smart Mini).
I performed the following steps
1) Enabled USB Debug
2) Connected the phone to an Ubuntu Desktop virtual machine where I have previously installed
adb (Android Debug Bridge)
3) Installed Framaroot-1.6.1.apk on the phone (to get root privilege on the mobile phone)
4) Restart the phone
5) Installed BusyBox_Pro_11.apk on the phone
6) Restart the phone
7) determine the physical partitions available using the commands
a) "cat /proc/mtd" to check yaffs2 file systems
(no yaffs2 partitions available on the phone)
b) mount to check the other partitions
the output of the command is below

rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
emmc@android /system ext4 ro,noatime,noauto_da_alloc,commit=1,data=ordered 0 0
emmc@custpack /custpack ext4 rw,relatime,noauto_da_alloc,commit=1,data=ordered 0 0
/dev/block/loop0 /mnt/cd-rom iso9660 ro,relatime 0 0
emmc@usrdata /data ext4 rw,nosuid,nodev,noatime,noauto_da_alloc,data=ordered 0 0
emmc@cache /cache ext4 rw,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered 0 0
emmc@mobile_info /mobile_info ext4 rw,relatime,noauto_da_alloc,commit=1,data=ordered 0 0
/emmc@sec_ro /data/nvram/md/s ext4 ro,relatime,noauto_da_alloc,data=ordered 0 0
/dev/fuse /storage/sdcard0 fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

8) I decided to acquire the partitions

/system
/custpack
/data
/cache
/mobile_info
/storage/sdcard0

9) Executed the acquisition of the partition listed above by using dd and netcat

Do you think that the procedure I followed is forensically correct?
Do you have any suggestion about it?

Best Regards,
Andrea Liguoro