TTnet currently offers several tariffs based on speed, and how much you download each month (quota):

Most people will be on the basic 1Mbps speed, 4Gb per month quota, which is a great package for most users. However you should consider moving to the unlimited tariff if you regularly exceed your monthly quota, or if you are thinking about streaming media (e.g. listening to UK radio, or watching TV on-line), or are a heavy downloader.

So how do you check your usage?

1. Go to http://www.ttnet.com.tr/adsl-kota-sorgulama/
2. Enter details as follows:
   1. E-Posta Adresiniz: your email address - (doesn't need to be a @ttnet address)
   2. Kullanıcı Adı: your ADSL username - should be somthing like: myname15@ttnet
   3. Şifre: your ADSL password
   4. Güvenlik Kodu: - the security code in the image
3. Click "Tamam"
4. You may get a pop-up security statement - just click to accept this.
5. From the top menu, here are the options:
   1. Kullanım Bilgileri> Aylık transfer - This is the key one - look for the column "Toplam Download", this is the one which you need to watch (the upload total does not count towards your quota).
   2. Şifre İşlemleri> Şifre değiştirme - Change ADSL password
   3. Çıkış - Exit