M1 announced on Tuesday that it will provide one day's worth of free local mobile calls, SMSes and MMSes on Wednesday.
In a statement issued on Tuesday, the telco said: 'Due to an unexpected technical failure on a card in one of our many customer management servers, a small percentage of our customers was not able to connect to our network on 18 May 2011.
'In view of this incident, M1 advises that all our customers will enjoy one day of free local mobile calls, SMS and MMS, on 25 May, Wednesday.'
M1 added that the free service will last from 12am to 11.59pm.
The free calls, SMSes and MMSes will not be deducted from the free minutes and messages included in M1 customers' existing mobile service plans.
'We are sincerely sorry and would like to thank our supportive customers for their understanding. Our customers' experience is of key importance and we will continue to improve the robustness of our network', M1 said.