I have a lavalier mic and an external hotshoe mic with wind screen that attach to my iPhone. Neither seem to override the built in mic. No idea why!I use a rode ntg4+ on all my talking head videos. A rodevideomic for vlogging, and a rode nt1 for audio recording for gameplay! What are you using?
The Blue Yeti Blackout edition! i think it's an amazing mic. the only problem is it's a condenser mic and if you record in a loud environment it'll pick up everything. i don't record in a loud environment but my Playstation was really loud it needed a cleaning so i the mic would pick up all the noise which wasn't good but i cleaned out the playstation added some new thermal paste and it's so quite now and the audio from the mic is amazing too!
Blue makes some good products, I stopped using them personally when they wouldn't honor my warranty. Always look at the warranty!Since I just started out I bought the Snowball iCE microphone. Honestly, its pretty good for starting out!