We at Astro continuously strive to provide the best viewing experience for your customers. As such, we focus on offering High Definition (HD) content where possible. As an Astro IPTV customer, you can enjoy this service absolutely FREE.
From 22 February 2017 onwards, both National Geographic and Star World channels will be made available only in HD on Astro IPTV platform. Put into another words, SD version of the respective channels (CH553 and CH711) will no longer available for Astro IPTV customers. Regular Astro customers using satellite dishes (DTH) are not affected, and SD channels will still be available.
All Astro customers (except Family Lite dan NJOI) able to enjoy free channels preview in all channels in Mustika pack from 17 until 23 February 2017, which consists of Astro Warna, Astro Citra, Astro Bella & Astro Mustika HD.
Do note that Astro B.yond box is required to watch Astro Mustika HD.
Source: Astro 
Astro on the Go has added 3 new channels into their Live TV channel lineup. As of now, it is now only exclusive on Astro on the Go platform only. Astro will announce to all Astro customers should these channels will be launched on its Astro TV platform in the future.