[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] pengipete:
"Newer" phones have had a hardware fix - according to Sony Ericsson. The jury is out on that one though as there's no confirmation of the build number's that have the fix and there's no real agreement on whether it has "gone" or merely been reduced to a lower level. In fact, there appears to be at least two different noise problems - a rythmic pulsing and a higher-pitched clicking noise - so it's often difficult to know which people are talking about when their posts aren't detailed.

Touch screen - excellent. I've had no problems with it - even with a screen protector attached.

Battery life - difficult question. If used as a phone, it will last for ages. If you use wi-fi and other heavy draws, it will obviously reduce battery life. Even then, it's very difficult to make a fair comparison with any other phone - you'd have to have a genuine like-for-like comparison - even the signal strength and line speed from the network source will impact on how much work the phone has to do. As a purely subjective opinion - it's acceptable. I often leave wi-fi on all day and play games, watch videos and generally "play" with the phone for a full day - I just recharge it at night - and it's never run flat. Regarding heat - I've never noticed it even getting more than vaguely warm.

Reception - an odd one. It does seem well able to pick-up on the weakish signal where I live but it has a strange habit of losing the connection even when there is a string signal. It doesn't do that all the time and it appears to me to be a software rather than a hardware problem as it seems to happen after using certain apps or performing certain functions. Having said that, I've yet to lose a call.

Is it fast - hell yes. A 1GB single-core processor is hardly going to break any records but the phone "feels" great - I've yet to find anything that suffered any obvious issues as a result of the CPU speed. Considering the price - which has recently halved in the UK - it is miles faster and more responsive than anything else I could find. Video playback is smooth and seeking within vids is instantaneous, webpages are rendered very quickly - including graphics and - of course - the phone supports Flash properly so that includes animated graphics. The games I've played have been smooth and I've not noticed any feeling that the phone is holding me or the game back. There is an occasional, very slight, stammer if playing a game which has banner-adverts popping up but I've seen that happen on phones with faster CPUs - and switching off network connections (or rooting and installing an ad blocker) stops that anyway.

Overall - you can't buy £500's worth of performance for £130 - but I reckon this phone delivers twice what it cost. If you need top-of-the-range performance, you have to pay top dollar - but if you are looking at a phone in this price range, I don't think there are currently any serious alternatives.

One thing - the small screen is something you have to take into account - and that is entirely down to what you expect to use the phone for. Bear in mind that although the screen is small in size, the resolution is actually pretty good compared with most phones at this price. It's not ideal if you want to do a lot of reading or browsing - text is lovely and clear but no screen this size can compete with a larger screen where you can see more than a paragraph at a time. For general browsing though - checking the news and reading through forums etc - it's perfectly good.

It's worth mentioning too that the keyboard is great. The keys look tiny but there's plenty of space between them so accurate typing is pretty easy.

There's one big downer for me with this phone and even though it's something you didn't ask about (and may not matter to you), it deserves a mention. The camera - still and video - is awful. The still camera produces lifeless, soft pictures that look like they came from a sub-1M camera from ten years ago. The supposedly "HD" video camera is just about acceptable in the brightest of natural light - otherwise it is soft, grainy and about as "good" as the average 1.3M webcam - only the pixel size of the output film is high - as if it filmed at 1M and then stretched the film in software. This is one of the most common criticisms of this phone and it is hoped that SE can fix these problems as they appear to be down to the software over compressing the photos and vids to reduce file-sizes. A "quality" setting for the camera (often found on higher resolution cameras) would be the obvious solution - and should be easy to add.

And then there's the BIG upper for a lot of people - SE are already working on getting Android 4 - Ice Cream Sandwich - rolled out for this phone. It is hoped that we'll start seeing that within a few weeks. If nothing else, that will protect the resale value of the phone - you should be able to get a good price if you sell the phone in a year's time because it will still be fairly up-to-date - the same doesn't apply to many other phones in this price-range.

Hope that helps :)