You got no service from a singtel mvno(vivifi) and you decide to try another singtel mvno(zym/zero1)?The initial MVNO was giga and then to vivifi. But due to "no service" from vivifi in a very congested coffee shop during dinner time. I decided to either try out zero1 or zym. Kinda like hit or miss. Maybe i am the one of unlucky one to experience no service from vivifi. Even sending an email to vivifi at that point of time it's a challenging task. Had to walk out of the coffee to get some signal recovered. If not I won't be planning to switch telco.
Try starhub or m1 mvno or even simba then.
