How to Changing the UEM on a Nokia phone

[rj200144]

Hi guys im new here so bear with me.
Ive got a few phones wich are barred and could do with unBLOCKING!
To do this am going to purchase a griffin box v2.06, but before i do this ive read that i would need to change the UEM. i have opened the phone which im using to test removing the UEM chip on which is a 'nk 8310' and i have found the uem chip which lucks to be nicly stuck to the pcb! its showing no legs or any thing so i was wanting to know, HOW DO YOU REMOVE THE UEM!

My first guess was with a soldering iron
and my second guess would be a heat gun

Could someone please tell me how to remove the uem or have any links that tell you how to remove these sort of chips!
Thanks RJ

[marvik]

Hi guys im new here so bear with me.
Ive got a few phones wich are barred and could do with unBLOCKING!
To do this am going to purchase a griffin box v2.06, but before i do this ive read that i would need to change the UEM. i have opened the phone which im using to test removing the UEM chip on which is a 'nk 8310' and i have found the uem chip which lucks to be nicly stuck to the pcb! its showing no legs or any thing so i was wanting to know, HOW DO YOU REMOVE THE UEM!

My first guess was with a soldering iron
and my second guess would be a heat gun

Could someone please tell me how to remove the uem or have any links that tell you how to remove these sort of chips!
Thanks RJ
Hi,
if it is ur first time doing this work better live it to pro m8 before you doing somthing that F**k ur phone you need a heat gun then ther is the raisin aroung the uem if you try to heat it up you burn the board so live it to pro
Regards
MaRvIk

[rj200144]

Thanks for the reply
Ive done abit of soldering and stuff before so its not that new to me, but these little sort of chips with the small legs are new to me an i would like to learn about ways of removing them and puting the back on a pcb.
Its the knoweldge and experience im after :D
Thanks Rj

[broker218]

Thanks for the reply
Ive done abit of soldering and stuff before so its not that new to me, but these little sort of chips with the small legs are new to me an i would like to learn about ways of removing them and puting the back on a pcb.
Its the knoweldge and experience im after :D
Thanks Rj

that kind of chip is called a BGA IC... BGA is Ball-Grid Array, which means that the contacts are actually little ball bearings that serve as a connection to the PCB terminals. to remove a BGA IC, you need to use a heat gun with a .25 inch nozzle, some liquid flux, and forceps.

note, however, that before reattaching the UEM, you will need to reball it. that is, you need to buy a reballing kit and follow the instructions.

too much trouble if you ask me... if you will only work on one fone, it would be better to just pay ;)

[rj200144]

Cheers for the reply that was extremly helpful.
i was just wondering if you know a cheap place where i can purchase the liquid flux, forceps and reballing kit.
Cheers . RJ



P.s.Thanks Alot for you help guys