The company also plans to double its subscriber numbers to more than 600,000 this year.
President Prachuab Tantinon yesterday said the package was expected to help boost company revenue from Bt2 billion last year to Bt3 billion this year.
Earlier, its customers paid the same monthly fee of Bt590 but received a speed of only 1mps.
The new package covers all provinces and some areas of Bangkok. TT&T Subscriber is a subsidiary of TT&T, which operates fixed-line telephone services upcountry but not in Bangkok.
True is the country's largest broadband-Internet provider, with more than 600,000 subscribers. Last month, it launched a new broadband-Internet package, featuring a speed of 2mps for Bt890 a month. Subscribers to the package are also entitled to connect to the Internet wirelessly free of charge in areas covered by True's wireless-Internet network.
TT&T Subscriber will spend Bt50 million to market its new package.
Separately, Prachuab said he hoped the National Telecom-munications Commission (NTC) would soon grant licences to operate WiMax technology for offering wireless broadband-Internet connection services.
The NTC is expected to grant the licences this year.