By Will Radecki in the Dominican Republic

I read with amazement this week that in Uganda, text messaging accounted for $39 million in revenues over the last two years. Ugandans sent 354 million SMS messages in 2008. It’s no surprise that SMS is popular in Africa. What’s surprising is that I’ve been living in the Dominican Republic for almost a year and haven’t seen anyone send a text message.

What is the determining factor for the widespread use of text messaging? Some might say income – Ugandans send text messages instead of make voice calls to save a few shillings – but this wouldn’t explain the 1.3 billion text messages sent daily in the US. Others might say reliability. Voice calls are dropped so regularly in some developing countries it’s just easier to write and send the whole message. And a colleague suggested it may be the ratio of voice to text prices. Where the ratio is higher, the more likely people substitute text for talk.

But I wonder if there is any research out there on the cultural affinity for texting. When I ask Dominican friends why they don’t send text messages, they just laugh and say, “When I want to tell people something I just call them.” Reliable data on a cultural preference for voice over text (or for any mobile phone function over another) would be valuable indeed for operators. It could help guide a number of company decisions on anything from marketing efforts, service offerings to network infrastructure investments.