Once you've purchased an expansion pack (Metal Signature Pack, Bass Expansion Pack, or Acoustic Expansion Pack, Experience Jimi Hendrix™ pack, OMNYSS), you can activate them by simply log out and log back into ToneCloud within BIAS FX 2 Mobile.
Contents of Expansion Packs
For the other expansion packs, please check below:
Experience Jimi Hendrix™ for BIAS FX 2 Mobile Contents
OMNYSS for BIAS FX 2 Mobile Contents
How to find the items in expansion packs