Where we live now, we only had Internet via 4G, but we talked to 3BB (the only provider in the area) and after many talks they agreed to install Fiber from a nearby (2kms) point (but it took around 4-5 months)
In the end it cost us 16k THB to have it installed, and now over 2 years in we are very happy and we have great speeds but NOT the speed according to our package which is 1000/500 but more like 300/150, but that is good enough for us.
For example: Netflix / Hbo Go / Disney Hotstar all work without any buffering!