AT&T announced a budget-friendly Android handset this morning, trotting out the $29.99 Huawei Impulse 4G.  Expected to arrive on September 18th, the handset runs Android 2.2 Froyo (what?!) and features a 3.8-inch display, 5-megapixel camera, and support for AT&T’s HSPA+ network (not the 4G LTE).  Processor …

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