KTF has signed up 2.11 million users of its 3.5G HSDPA network in just seven months. Launched in March this year, the network claimed a million users in July. KTF says 23.7% of 3.5G subscribers are in their 20s, 22.6% in their 30s, and 20.5% are teenagers. KTF has signed up 2.11 million users of its 3.5G HSDPA network in just seven months. Launched in March this year, the network claimed a million users in July. KTF says 23.7% of 3.5G subscribers are in their 20s, 22.6% in their 30s, and 20.5% are teenagers.