I couldn't send a text the last time I was in Hartford ( Villanova game ) ...I got a "not delivered ! " notice next to message.
As someone who works in this field, u have two issues.
1. No connectivity: caused by weak in-buikding cell penetration. More often affects carriers with weaker coverage and higher frequency spectrum(think metropcs, sprint) than higher coverage saturation carriers with lower spectrum (vzw, att). You will see no bars or have very sketchy coverage due to the building materials sapping wireless penetration.
2. Network over-saturation. When the requested connex/bandwith overwhelms available ports/bandwidth capacity. You will see high coverage levels (the cell is finding the network), but will be unable to hold a solid data connection. You should be abke to push text messages through and make voice calls in many cases.
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