The sales suggested me to choose $88 plan first. I can upgrade to $148 plan in the first month if I find it's too slow. If I want to upgrade from second month, the contract will be extended.
I talked with the HKBN technician yesterday, he said that $88 plan was enough for Fb, Apple Daily & Whatsapp. So no need to choose $148 plan. But $88 plan excludes the tunnel fee.
HKBN sales also says that their smartone network is better than cmhk but a little bit expensive if you choose smartone network. and you can free SMS to smartone friends. I am considering to choose their $148 plan with 5G