I recently had a problem with my Asus P320 mobile phone, looked up on the net and couldn't find details of the service center for Bangalore, apparently it recently shifted last month. Thought I post the details here to help out others. The service center services all ASUS products, not just mobile phones.
The ASUS Service Center or Asus Royal Club as it is called is located at
Number 1105, 3rd Floor, Kambi complex,
Near Corporation circle,
In terms of Landmark it is behind the LIC building adjacent to Adigas restaurant.
The phone number is (080)22112942. Prior to this I came across an All India toll free number but I couldn't get anyone to pick it up, the number was 1800 2090 365.
The timing are 10 am to 8 pm on weekend days and 10 am to 5 pm on Saturday. You will need your bill as proof for warranty.
I have put together a blog for this phone over here
If you have found this useful, do drop me a comment, if your feeling generous click an ad :)
There is a lot more information available on the Asus P320 at the following site