GSM Desktop phones are the simpler and cheaper alternative to land-line phones (PSTN). They combine the simplicity of a desktop phone with the flexibility of a mobile phone, using a mobile phone SIM card, it lets you to make and receive phone calls using the worldwide GSM network instead of having to use the traditional landline with cables. This phones can be used in offices, homes and on the move with their inbuilt batteries. WCDMA 3G Desktop phones apart from the GSM functions can also be used as a 3G internet modem to provide you with additional features that a 3G network can offer, like 3G internet connection and much faster data transfer. They are great for Office and Business use and equally brilliant for Home use.