Samsung galaxy BuildNumber issue

After reading and researching for nearly a 1 week about N7000 Andriod Device ( i'm new to it) i finally picked up from a friend of mine the galaxy Note N7000, he said he already has updated it to jelly bean 4.1.2 which i confirmed through the settings menu but the device is running a little slow i'm thinking of rooting it then booting a custom rom + kernel (i'm new to that as well) here is the information about the phone by the way he picked it up from United Arab Emirates a couple of years ago. I found a lot of guides and tutorials on XDA but the last letter on the BUILD NUMBER doesnt match thus i cant proceed to root or do anything else cause all the devices that were used had LSZ and Mine has LSB i was wondering also if it has any impact on the phone, i have no idea what to do.

Thanks in advance.


Model number GT-N7000
Andriod Version 4.1.2
Baseband: N7000XXLSO
Kernel Version 3.0.31-906407
dpi@dell237 #3
SMP PREEMPT TUE FEB 19 22:05:07 KST 2013
Build Number JZO54K.N7000JPLSB