While I agree it isn't much to complain about, but who are we to decide what people complain about? If someone calls and complains about it and gets a discount on their bill more power to them. To me, it wasn't a big deal and it didn't bother me. To some I could see how it was, some use their phone non stop for work, could be traveling and need business information and then couldn't get whatever they needed.
Also maybe his phone was his only source of internet to search on and he didn't have access, thus driving to the store....