I think maybe you answered the wrong post? I agree, what you describe might be what @WhoDatChick was experiencing.It might be that the ads are clogging your phone's memory and/or the bandwidth available and making attachment upload (which is usually way slower than download anyway) really hard. Meaning your phone is busy processing the ads and can't do much else.
I've never had a problem using byc on my phone.
My reason for avoiding ads is that I find tracking creepy, so I reduce it as much as I can.