Requirement:
1. jailbroken idevice
2. infinite painter app
https://apps.apple.com/us/app/infinite-painter/id1146543227
3. flex 3 beta tweak
repo: http://getdelta.co/
Steps:
1. install the infinite painter from appstore.
2. add the repo of flex3 beta to cydia or any package manager you have(zebra/installer).search for flex3 beta and install it. respring your idevice.
3.open flex3 beta app and on the top right,tap the + symbol and search for painter. process it..
4. tap add unit, onExecutable section ,tap Painter then on the search bar type the word fullversion.. youll see two search results, choose isFullversionWithoutTrial.tap back twice then in the Units section tap isFullversionWithoutTrial.
Next tap
Return Value(bool) then override value and choose the value TRUE. tap the back button until you return to patches section and active the patch..
open the infinite painter app and it will be a full version.