What android version do you use? Termux is compatible with android versions >=7. The model of your phone shouldn’t make any difference. Have you tried updating the f-droid repository (swipe down in the f-droid home/main screen)?
What android version do you use? Termux is compatible with android versions >=7. The model of your phone shouldn’t make any difference. Have you tried updating the f-droid repository (swipe down in the f-droid home/main screen)?