Samsung GALAXY S II
Okay, you probably saw this one coming. The fact of the matter is that the Samsung GALAXY S II is one of the most capable smartphones that T-Mobile has to offer, which means that it is suitable for people demanding the very best. Not only that it sports an enormous 4.52-inch Super AMOLED Plus display with a resolution of 480 by 800 pixels and a 1.5GHz dual-core Qualcomm chipset, but it can fly on T-Mobile's HSPA+ networks at speeds of up to 42Mbps. The icing on the cake is the beautiful TouchWiz UI which comes pre-loaded on top of Android 2.3.5 Gingerbread.
HTC Amaze 4G
Another T-Mobile smartphone that we absolutely need to include in the list is the Android-flavored HTC Amaze 4G, which brags a lot with its photographic skills. On the back of the device is situated an 8-megapixel camera with a BSI sensor and a f/2.2 aperture size for better low-light performance. But let's not forget that the snapper is virtually free of shutter lag and that is shoots 1080p videos with ease. But besides being a good substitute for a bulky point-and-shotter, the HTC Amaze 4G is a great smartphone as well. It offers a 1.5GHz dual-core processor, a marvellous 4.3-inch qHD screen, and 42Mbps 4G connectivity over HSPA+.
HTC Radar 4G
If the one you are searching a gift for has an aversion for supersized Androids, the mid-sized HTC Radar 4G is what they might like. It runs the elegant Windows Phone 7.5 Mango platform and catches the eye with its solid, unibody construction. On its front glows a 3.8-inch Super LCD display and a snappy 5-megapixel camera with f/2.2 aperture resides on its back. Processing power is delivered by a 1GHz single-core processor, which might seem below par at first, but it shouldn't worry you much as the Windows platform is tailored to be run by it without a hitch.
HTC Sensation 4G
Another Android heavyweight? Why not. The HTC Sensation 4G is both good looking and powerful, so it would be a great gift for both the tech-savvy and the design-conscious. Among the highlights of the device are its eye-pleasing 4.3-inch qHD touchscreen, its speedy 1.2GHz dual-core processor, and an 8-megapixel camera that can capture 1080p video. The Android experience is beautified by the HTC Sense interface, which brings along a ton of eye-candy like 3D animations, masterfully drawn icons, as well as the ability to launch apps straight from the lock screen.
Samsung Galaxy Tab 7.0 plus
The Samsung GALAXY Tab 7.0 Plus is a tablet that fuses portability and performance together. It weighs only 345 grams so it is really easy to carry around, yet inside it ticks a 1.2GHz dual-core processor for great multitasking performance. But the really cool thing about it is that it offers a 21Mbps HSPA+ radio that can keep the tablet connected to the web even when you are on the go.