How do I merge contacts based on phone numbers? I have been using 2 SIM cards in 2 separate phones and until recently I bought the Alcatel OT-918N Glory, a dual SIM Android phone.

Since I had 2 phones before, I am expecting to have duplicated contact numbers. I will be importing numbers from my 2 SIM cards and I need to know the best way to handle duplicate numbers in Android.

Is there a way to merge contact numbers based on the phone numbers?
If you can pull both sets of contacts into the Google Contacts app on the phone, and let them sync with Google, you might then be able to merge duplicates via the web-based contacts page: https://mail.google.com/mail/u/0/#contacts  Click the "More" button, then choose "Find and Merge duplicates".