A Vietnamese goverment agency this week passed legislation that requires mobile network operators to boost the success rate of text messages, according to multiple reports.

The Ministry of Information and Communications ruled that the operators must ensure a 92-percent success rate for SMS and that delivery time must not exceed 20 seconds. The new law becomes official Jan. 15.

The department believes the new rule will force the operators to improve network quality, which reports indicate is a longstanding issue in Vietnam.