If you’re planning to get a 16GB iPhone 3G on Fido, better do it soon as the latest news is that they’ll start depleting their current stock starting next month.

We’re still not quite sure what the reason is behind this bold move, but it could have something to do with a new iPhone, and a cheaper one at that, that’s on the way. Of course, this is just pure speculation at the moment, but consider this; Fido has rebranded itself as a discount carrier offering affordable phones and plans for the people, and the 16GB variant of the iPhone 3G doesn’t exactly fit into the title of being affordable. The 8GB iPhone 3G will still be available on Fido, but there has also been persistent rumors that Apple will be launching a sub-$100 iPhone which will certainly be a nice addition to Fido’s current line-up. Of course, we could be totally wrong on this issue and they’re just getting rid of the expensive 16GB variant.

Anyway, we’ll probably get more information as the days go by. Nonetheless, if you’re a loyal Fido customer and has been holding off getting a 16GB iPhone 3G, now is a good time than ever to get one as you won’t be seeing it offered on Fido after April.