How long has my Kindle got? With reference to your recent reply to a query regarding 4G mobile phone networks, I am concerned that my 3G Kindle will become obsolete. If, as you say, 3G may be wound up in 3 years or so, how will I continue to download books? David Pinder, by email Three years was my guesstimate for the full deployment of 4G networks in the UK. I have no doubt that 3G services will continue for several years after that, allowing plenty of time for users to update their phones and devices. Even if they were to go in such a short timeframe your Kindle would still be able to download books from Amazon and other e-book services using its Wi-Fi connection or via a PC. The question is, will you still have your present Kindle in five years? Possibly not; there's a very fair chance that you will have upgraded by then, or it will have expired because you dropped it, sat on it or the battery died and it wasn't worth replacing. Who knows, you might even abandon e-books altogether and revert back to those old fashioned text readers, the sort that smell nice and don't require batteries or Internet connections...