[Q] Is there a way to restore deleted system file?

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Hi everyone,
2 days ago I tried to update my aunts sensation xl and told her that it is better to update its ROM from 2.3.5 to 4.0.3.
So i created a google account in phone and added it in order to sync contacts....and after 2 hours, I thought that it has been synced.... but I was wrong.
After upgrading device to ICS, and adding the previous account that i made before upgrading, I was waiting for contacts to restore, but nothing happend....
I opened the gmail account on PC and saw that there was no contacts. So the only way for me to restore the contacts is to find a way to restore them from Phone device.
So,is there any software, either on phone or PC, to restore contacts from phone? or is there a way to have access to root folders and files of phone on PC to use a recovery program to restore "Contacts.db" file that was erased while flashing ICS?

I will appreciate any help from you guys to help me saving my reputation.....

Phone contacts do not show up in Gmail address book, search google for google contacts or google phonebook/addressbook. I forgot what its called, but its part of your google account.

Sent from my HTC Sensation XL with Beats Audio X315e using Tapatalk 2

I know where is contact link in gmail, I manage them on my own account, so the problem is not about gmail account, the only way is to recover them from my phone...

Any other suggestion?

Hi, I am facing the same problem
Have you found some kind of resolution?

Tks

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