Because your iPhone is bound to have issues during traveling and you’ll need assistance on what to do.
Software repair:
- 3rd-party Software – because the official Apple route requires a long download. Using 3rd-party software lets you choose pre-downloaded firmware. Best software so far is this MiniCreo! The free version does enough. The paid version costs less than others. But if you want to try others, Tenorshare’s ReiBoot was good. iMyFone and UltFone seemed fine as well.
- Download firmware – from ipsw.me site.
- Restart into recovery mode: official Apple documentation.