Thailand’s largest mobile network operator by subscribers, Advanced Info Service (AIS), will allow national roaming for its 3G customers on state-owned telco TOT’s network from the beginning of October 2011 Cellular News reports. As previously reported by CommsUpdate, last month the duo struck a deal under which AIS customers would get roaming access on the TOT 3G mobile network for data, and TOT customers would get roaming access on the AIS network for voice and data services. Initially it is expected that TOT will allow some 60,000 AIS customers to use its 3G network in Greater Bangkok for data roaming, while AIS will in turn allow 200,000 TOT customers voice access and 10,000 users to access data services. In the longer term the deal reportedly allows both parties to provide roaming access to up to a million customers each. The agreement itself was finalised after TOT successfully negotiated AIS’s proposed roaming fee downwards; AIS will give TOT 30% of revenue it earns from subscribers using the TOT network for roaming access.