The rationale for users suggesting this "fix" is because the Patch sent by Etisalat to your BlackBerry constantly tries to "call home", to communicate with Etisalat's servers, hence the battery drain.
If you think that just by disabling the Patch's ability to connect back to Etisalat's servers is a solution, you cannot be further from the truth. You may no longer be experiencing battery drain, but you will be wasting your device memory. The Patch continues to try to call home, even though it can't, hence it may cause memory drain. You'll start to realize that your BlackBerry is performing worse than it used to, perhaps slower, because of this.
It's up to the readers of course, what to believe. But for me, I'm taking the opportunity to clean up my BlackBerry and make it as good as new by following the instructions posted on
www.berryuae.com