Why do orange 3G sim cards and o2 3g sim cards work in my phone but not 3 mobile 3G sim cards work?

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Why do orange 3G sim cards and o2 3g sim cards work in my phone but not 3 mobile 3G sim cards work? I want to know because it won't work in my phone. In Sharing Asked by Sarah-j... Age : 25 0 Answers Sarah-j... 119 Views 1 month ago 1 month left to answer Vote 0 Tweet Report Abuse Email to Friends Add to Favorites Question Badge Use this wwuask.com question badge in blogs, websites, forums. Copy and paste the HTML below:

I want to know because it won't work in my phone.

In Sharing Asked by Sarah-j... Age : 25 0 Answers

Sarah-j... 119 Views 1 month ago 1 month left to answer Vote 0 Tweet

No answers!