Looking for a Thai Island or coast to rent a flat with good Wifi

Hi everybody!
I'm looking to stay for a couple months next to the sea, to a nice thai island or thai coast, where that would be possible to rent a flat and get good and fast enough Wifi, as i will have to work on internet during this time.
Will be from middle february to probably middle of may approximately.

If anybody here knows about such a place, a flat to rent or any information, i would be really interested!
Which island or thai coast would you suggest for finding it?

Thanks a lot,

[Moderated: pls no free ad]

Huahin ,Phuket or Pattaya are common hot places for foreingers. If you like quiet place ,I think Huahin is a good place.

Thank you for information!