When I signed up, they gave me two more data-only SIMs that have 3GB every month. A few months back, Zym had an outage, and hence they compensated by giving all subscribers an additional 100GB for 90 days. So my two free SIMs have 100GB now for 90 days.
I was using the Huawei MiFi E585 which I bought 4 years ago till the battery life decided to give up on me. The battery will go flat after about an hour of usage. On top of that I am spoilt with 4G because the 3G speed is way too slow in Singapore, due to bandwidth congestion.
Bought the Huawei MiFi E585 for S$185 from Amos of Hardware Zone Forums. It is a mobile router that makes use of your SIM card to connect to the Internet and the router itself supports 5 devices simultaneously.
It is similar to any 3G Modems but instead of only allowing one device (normally only computer) to use it via USB port, the MiFi allows up to 5 devices as long as the device have WiFi support which most if not all of the smartphones these days do. The MiFi is essentially a mobile router and hence it is capable of basic router functions such as DMZ, DHCP, SSID configuration, etc. You can configure those options using the router’s web-based interface (192.168.1.1) and the interface is mobile friendly as well. The E585 also comes with a MicroSD slot that you can use it as a shared storage for all the connected devices.