Developing a cellphone contacts backup application

[AceK]

hi there, I am currently developing an application for backing-up cellphone contacts to a computer. The problem I am having is that I need my app to auto detect a cellphone (i.e. regardless of the Make and Model) when plug onto a computer and with a single click of a button "Backup" the app must backup all contact on the cellphone onto to the computer. How can I get my app to auto-detect a plugged cellphone and how can I go about reading the cellphone's contacts. any suggestion will be appreciated.

[MiiNiPaa]

How can I get my app to auto-detect a plugged cellphone

Different phones have different methods of telling their info. Search about it and try each one in your program until you detect pphone successfully.

how can I go about reading the cellphone's contacts

After you detect phone model, you can employ phone specific way of accessing contact data.

[AceK]

So this basically means that there is no universal way to read cellphone contacts regardless of the cellphone's make and model?

[MiiNiPaa]

You can thank mobile phone makers for using incompatible standards. Srsly how can you expect to have uniform way to read contacts if we even don't have uniform charger standard for all phones? Not to mention really crossplatform apps.

[AceK]

You are making a lot of sense. I guess I have to pre-select a few cellphone makes and make my app compatible with those.