With regards to your inquiry, we understand that your phone is not able to use the 2nd SIM card.
We apologize for the inconveniences caused.Please be informed due to the 2G closure in Singapore, all 2G networks will be rendered unusable. Therefore, your 2nd SIM will not be functioning. In order to continue using the 2nd SIM slot, please update your firmware from our website.
From 1 April 2017, the 2G network across all telcos in Singapore will be closed. But not to worry – you can continue to enjoy our phone and data services without disruption simply by upgrading to a 3G or 4G handset now.
Dual SIM card
SIM 1: 2G/3G/4G Micro SIM Card
SIM 2: 2G/3G/4G Nano SIM Card
Dual SIM Dual Standby
Only use the nano SIM card or the microSD card at a time
Both SIM card slots support 3G WCDMA/ 4G LTE network band. But only one SIM card can connect to 3G WCDMA/ 4G LTE service at a time.