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Continue to ChatSoftware update on 16th April for Lumia 900 or swap the device now. Get $100 credited to your AT&T bill. Nokia's proactive action for Lumia 900's data connectivity issues. https://nokiapoweruser.com/software-update-on-16th-april-for-lumia-900-or-swap-the-device-now-get-100-credited-to-your-att-bill-nokias-proactive-action-for-lumia-900s-data-connectivity-issues/