How to change/restore IMEI no. on Android phone and tablet.

How to change/restore IMEI no. on Android phone
and tablet.
HOW TO CHANGE/RESTORE IMEI NO. ON
ANDROID PHONE AND TABLET.
Many of you guys may be facing the problem of
invalid IMEI number. So here I provide you the
trick
to change IMEI number.
In case IMEI number gets changed or you get an
error saying IMEI number invalid then don't panic.
Now before doing this trick note down your
original
IMEI number given on the box.
On the box of Dual Sim handset you will fing two
IMEI numbers.
!) Open the Dialer and type *#*#3646633#*#* and
dial this number. Doing this you will enter the
Engineering mode.
2) Then swipe left to connectivity.
In the connectivity click CDS information.
And tap radio information and then tap phone 1.
3) Now enter the command AT+EGMR=1,7,THE-
FIRST-IMEI-NUMBER
And press SEND AT COMMAND.
For the second SIM tap phone 2 in the radio
information and then type this command
AT+EGMR=1,10,THE-SECOND-IMEI-NUMBER
and press SEND AT COMMAND.
NOTE :- If *#*#3646633#*#* does not work and if
you are using a MediaTek powered handset you
can download the utility called MTK Engineering
Mode for free from Google Play, it will do the
same