Nokia may flood T-Mobile shelves with four Symbian-powered smartphones this year, starting with the $79.99 Astound — known globally as the C7 — on April 6th. Nokia officially let the wraps off of the C7 back in September, and it rocks a 3.5-inch AMOLED touchscreen, Wi-Fi b/g/n, Bluetooth 3.0, an 8 megapixel camera with flash and 720p video recording, and an FM radio. If the Astound launches, it will be the first Symbian^3 powered device to be sold by a U.S. carrier. Sources speaking to TmoNews also suggested that Nokia may not launch a Windows Phone 7 device until next year. We’ll be at CTIA in Orlando next week, where T-Mobile is expected to announce the Nokia Astound, so stay tuned for more.