China is cited by an OP. No serious options in China for contract phone.
What has become super common is for home cable provider to provide SIM with around 2G of data in order to pay monthly broadband charge. SIM recharge being easier than vanilla broadband recharge.
As teamhappy pointed out, I am kind of wrong, as the data did indeed change for contracts, but was is still low in 2015 regarding southern countries, the ones I tend to visit regularly.
But it would still be nice to know if someone can point out to 2017 data.