No operator has perfect 100% coverage in 100% of uses cases/areas.Which telco line doesn't had any dead spot like signal cannot get from tunnel, underground, building with no network?
Singtel,M1,Starhub, circle life, MyRepublic, others....
I can second the recommendation for ST+SH, but I use separate phones so that I keep contacts and messages distinct.Get 2 dual SIM phones
$10 Giga
$10 CMLink
$10 MyRepublic
$10 TPG
If still have deadspot or poor signal, I think better not use phone better. If not later blood pressure increase. I already have 3 of the 4 above. Would say ST + SH network would give you 99.9% of coverage needed.
Satellite work our door nia... in door cui.Satellite Phones
Connectivity anywhere where it matters.
https://www.singtel.com/business/pr...nd-mobile-satellite-services/satellite-phones