There's 5 symbols on the bottom of your phone in the middle there's A pen shaped symbol, use that.
Yeah, I got you. The mobile app seems A bit more limited than using A tablet, I'm not sure you can post pics on the mobile app.
Yeah, if your friends with someone there's nowhere on the mobile app where you could see their pics. Then again you could just go on safari and then go on the EP website on your mobile then though.
Using A Laptop is the best but I mostly just use my phone for popping off quick messages.