I switched from Singtel to Starhub only recently. The reception
for Starhub is weaker. Places that I was able to connect to the
network, I cannot now. But those are the less common places like in
the lift, in a basement or underground tunnel.
But, I must admit that Starhub's per second billing led to a lot
more savings in my monthly bills. Plus, hubber rewards points can
be combined with your Cable TV and MOL. ( If you've got them)
I'm not sure about the customer service at Starhub. Haven't called
them for anything yet.