To be fair though, it's different for everyone.
Most people on ST, SH, and M1 have no major problems with their reception; else they would have long ago ported out (unless they're stuck in a contract). It's a case of "your mileage may vary" and every home / work place has different reception.
The good thing nowadays is that with so many MVNO options, it's easy to jump around if your reception sucks; obviously the caveat being one needs to beware of any lock-in periods for new lines, but they are usually not one or two years like the MNOs; most of them are one to two months at the most for MVNOs. So this sort of flexibility is really good for us consumers.
Or as they say, "not happy then port out lor!"
(Notice I did not say anything about Simba's reception, that's because simply put, they are a joke.)