In emerging markets, the trend is even more dramatic; nine out of 10 messages are sent via mobile.
Some of the growth can be attributed to mobile instant messaging. Thirteen percent of all mobile subscribers used the feature, but 41% of smartphone users did so.
Other increases in mobile usage can be attributed to the abandonment of fixed-line telephones.
"As mobile devices slowly take away usage share from fixed services in developed markets, in emerging markets consumers are more likely to by-pass fixed communications altogether and go straight to mobiles," said Sam Curtis of TNS.
As for developed countries, the PC e-mail remains the most popular message method, but its use is waning.
In Japan, 40 out of 100 e-mails sent are from a mobile device. In North America, 69% of those using e-mail on their mobile phone use it daily, high compared with 43% global usage.
The trend will increase, TNS says, as smartphones such as the popular iPhone enter the marketplace and gain share.
