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The thing that really lets this mobile down though is the number pad. Now, I don't differentiate between the most expensive phones in the world and the least expensive when it comes to usability. A well made phone is a well made phone whatever it costs, and this time around, sadly, Sagem has entered the world of flat keyboards and in doing so has made an error.
The number pad looks as though it should be touch-sensitive but in fact you press on the keys to make contact. As you do so a delicate noise is generated to let you know you've made contact.
The problem is that the keys are small and not always as responsive as I'd like. Fingernails are needed for ultimate precision in hitting a key in the right spot, and I found texting at speed was not easy. The white backlit keys against their black background might look nice, but they are not the most usable.
You'll have gathered from my description so far that the my511X has pretensions as a music phone. It only runs to MP3 and AAC; no other formats are supported. Playback controls are quite good considering this is a budget handset, and you can create playlists on the phone itself. My review sample came without headphones and as the only two slots on the handset are proprietary I couldn't try a set of my own.
There is only 13MB of built-in memory, so clearly you won't be storing a great deal of music inside the phone. It's good then, that you have the microSD card slot option. The slot is side-mounted and it looks as though you can get at it by lifting a protective cover with a fingernail. Forget that, though. Try too hard and you'll break the cover off as it is moulded into the removable backplate. The upshot is that you have to take the backplate off to swap out memory cards. Not a real pain in itself, but something to note unless you want to end up with a broken backplate like I nearly did.
Battery life for music playback was quite good. I played music through the loudspeaker and forced the screen to stay on, and got seven and a half hours of non-stop music. For a budget mobile this is respectable.