Hong Kong Rules OKAY!!!!
It IS interesting to read the comments here - makes me VERY happy to be in Hong Kong where the mobiles I have had cost me between £60 & £70 with a dual SIM, and talking about SIMs, I only use voice & NO data, and the original HK$50 "starter" for something like 180 days actually cost me HK$30 (£3) with a "recharge" co$ting me HK$48.
The ONLY reason I "recharge" is because at the end of the recharge period I always have an astonishing HK$150 or so still in credit. I just CAN'T drive down the balance !!
Previously - I'd run the credit balance down to microscopic value - letting it expire - since a new SIM with new number would only cost me £3 for another multi-month validity.
As for the mobiles - a Doogee costing about HK$700 (£70) which I sold for $750 a couple of years later, and a Lenovo [also dual SIM] for ~£80 ----> Both from Groupon.HK.
Am I glad to have tossed UK out more than 40 years ago? You bet your life I'm glad!!