Here are some Greentel mobile phone offers featuring up to 3 SIM cards in one device and a dual sim standby features in some models. Correct as of 11 Nov 2012 except for Greentel G10.
Models listed are Greentel G10, Greentel GT-100, Greentel GT-400, Greentel GT-300, Greentel G8 and Greentel GT20
See ad image for price list and more details
Click on thumbnail[s] to enlarge.