Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) cell phone technologies, which is also being developed into a 4G technology.
Dual sim card adapter helps to use 2 sim cards in one phone. Yes I am using a card called Hypercard 3G and it really works with UMTS. I got it from
http://www.2-phones-in-1.com/
Linear Mode
