Network and Connectivity
Operating on the GSM 900 and 1800 bands, the Siemens A35 was limited to 2G technology, which was the standard mobile communication protocol at that time. It did not support GPRS or EDGE, meaning that data connectivity was non-existent, and the phone was strictly for voice calls and SMS. The absence of modern connectivity options such as Bluetooth, WLAN, or USB meant that file transfer and connectivity were not possible, making the phone entirely dependent on its cellular network for operation.