Summary: I have also SE Xperia X1 which I do not use because it has fatal keyboard, the overall quality is bad it was many time serviced. It does not have touchflo which makes using it a big problem. Although Kaiser was made much earlier still makes much better overall impression than SE.
Pros: High quality phone, everything in it,very good keyboard, touch-flo, HSDPA, GPS.
Summary: When it came to the time to renew my contract, I decided to step away from the bog-standard 'free with contract' phones and treat myself to something a little better. I researched carefully and narrowed my choice down to this, the MDA Vario II, or the Nokia N95. I chose the Vario for the full keyboard, reasoning that it would be easier to text and type, and signed my new contract. What a mistake.
Summary: Having been a big fan of the MDA Vario I decided to upgrade to the MDA Vario 2. It's a solid piece of hardware and a very good addition to the Vario range from T Mobile. For those of you who are new to the MDA Vario style, the PDA/phone is a very handy piece of kit to have with you. Although it is significantly heavier than most other phones weighing in at 176g this phone packs a punch.
Summary: Its a good top end smart phone. One small gripe is the manual talks about functions not present on the phone (like GPRS monitor) and it's impossible to disable active synch which is really annoying. However my big gripe is that the wireless modem function is impossible to enable. The manual says disable active synch and IRa first but the device lets you do neither! Its a shame T-Mobile can't write a manual that aligns wiht the device they brand and sell directly.
Pros: Top end smart phone has all the features required
Summary: Without doubt the best handheld device I've owned. Keyboard is superb for texting and emailing, being a Windows device it's very flexible, connectivity is second to none, easy to set up multiple email accounts, and the introduction of the jog-wheel is a surprising master stroke. But it's the HSDPA that really makes a difference. In an area with a good 3G signal I regularly get speeds over 1Mbps. In fact I just did a speed test and hit 1.4Mbps.
Pros: Keyboard, HSDPA, connectivity, ergonomic, well built, very stable, not too big
Summary: I bought the MDA after I had read several reviews and even then I was amazed by just how many things this device does in a relatively compact size. I wanted a phone, PDA, MP3, SatNav and camera all in one and it does everything required brilliantly. The only drawback is you need to handle it carefully, and the sliding keyboard can be opened accidentally giving it a flimsy feel.
Pros: Versatility, range of features, speed and clarity of internet access
Cons: Easy to hit the wrong buttons or open keyboard by accident.
Summary: I don't have enough words to describe how happy I am with this device. Internet experience is perfect despite the small screen; many sites are now fully PDA compatible which makes it easier. I can do everything with it. Push email is brilliant and the good thing about it is that none of my client (as emails don’t have any “Sent by Wireless BlackBerry” footer!) pretends I am always available as my emails are coming from my work server and not from RIM.
Pros: Total connectivity, push emails, stability. It has everything you need from a phone-PDA