Stay safe

Following yesterday’s topic, today we will implement the topic of “security” from theory to practice. It took less time than I thought because it wasn’t difficult or complicated to do. But it did take more time than originally planned, because I didn’t expect that I would need to consider so many details just thinking about the backup machine! For example, when you decide to choose an Apple mobile phone, in view of cost-effectiveness considerations, you also need to consider the differences between refurbished phones, brand-new phones, and second-hand phones. Because the focus of my consideration is: ① Long-term security updates > ② Hardware security architecture > ③ Reliability > ④ Cost > ⑤ New obsession. Therefore, I can’t help but focus on the details of choosing a second-hand machine like Zhuanzhuan, rather than obsessing over the most perfect pursuit of a brand-new machine. In the end, I decided to buy a second-hand iPhone 13 Mini model as a backup phone.

But this is just the beginning! Because after I decide to purchase this model, there are still some key details that need to be carefully checked, so the specific purchase checklist is as follows:

1. Is it unlocked by the national bank?

2. Is there any repair/replacement record? Send Parts & Service History screenshot

3. How healthy is the battery? Send screenshot

4. Does it guarantee no water intrusion/no motherboard repair/no capacity expansion?

5. Does it support self-flash recovery + non-compliance return?

Specific reason:

National Bank Unlocked

→ Reduce complex sources and machine lock risks

Official machine inspection + return support

→ Give yourself room for verification and correction

Battery ≥90%

→ Long-term drawer storage is more reliable

Check Parts & Service History

→ View repairs, replacement parts, Unknown Parts, logic board abnormalities

Check Activation Lock/ID Lock

→ Avoid buying devices that cannot be activated

Erase everything

→ Clear the remnants of previous users

computer recovery system

→ Reinstall Apple Signature System

Only password manager / 2FA / wallet

→ Reduce the attack surface and exposure surface

See, there aren’t many things to pay attention to when choosing a backup machine! After all, this is a major matter involving your own information security. At the same time, some passwords were changed and additional verifications were added. In this way, my safety mission can be said to be 80% completed. Continue to complete the remaining tasks tomorrow. In fact, this is what we need to do in the future. After all, we need to pay attention to safety everywhere in life.