The Asha 308 has Easy Swap Dual SIM support, which lets you swap SIM cards without opening the device or turning the phone off. It has 20MB internal user memory and supports up to 32GB Micro SD memory card. It is 13mm thick and weighs 103.69g. The Asha 309 has WLAN 802.11b/g support. Also have FM Radio with radio recording, GPRS/EDGE, Bluetooth 3.0 with A2DP, 3.5 mm audio jack, USB charging and a 1110 mAh battery.