simple question... but not so simple to answer..
i suggest you start with the device that you have..
if you have a Blackberry Curve.. then go post there..
if you have a Droid X then post in the Android Central forum..
We have made a Forum layout that we think makes sense. We have a general section, sections for each device, and then we have categories broken down by different things such as things for your devices such as apps, accessories and unlocking, carriers, Verizon, ATT, Vodafone, Social, etc. You would examine the Forum layout and then thing about your question and ask yourself where you think it would make the most sense. For example, if you are an ATT customer and you wanted to know what is the best plan for a family of 3 with 2 on Blackberry and 1 regular phone, then you would PROBABLY pick the ATT Forum. If you have a question about getting a device unlocked, then our Unlocking Forum is the place.
What type of question where you thinking about posting, maybe I can help direct you to the right sub Forum.