Jake Turcotte/The Christian Science Monitor
Visual voicemail– voicemails not delivered on time, disrupting schedules, and without explanation.
Activation woes – new iPhone owners met by sometimes days-long waiting periods when AT&T's activation servers went down on launch day for the 3G and 3GS.
Network unreliability – dropped calls are common, and system overloads at the South By Soutwest Interactive Festival and other high-profile tech gatherings.
Missing features – Apple announced tethering and MMS support in June, and despite being available on mobile carriers in other countries, AT&T has yet to enable the features in the US.