Option 2 will produce MUCH LESS wrong section posting that option 1.
Think about the reason why people currently post in the wrong section. Its because they jump into the phone section and either dont see the subforums, or not sure where to post so go for hte general option.
If at the time of thread creation, they are forcibly given the option to choose, they are way more likely to pick the right one.
All that equals much less work for mods/guides. It helps newbies who may be confused, and it helps get them answers because people are less likely to reply telling them they have posted inthe wrong section.