I don’t use the phone as much as other passengers, so the chance of low-battery is low, which tends to /obscure/ the risk of low-battery — In China trips, your smartphone is almost as important as your passport. Without your phone, you can’t make payment or take public transport. Therefore, we need to plan for the rare event of low-battery. The longer your journey, the “less rare”.

Tip: fully charge all phones before leaving home
tip: carry (perhaps 3) cheap, throwaway light-weight charging cables, as cheap insurance

— Q: how many phones and how many SIMs .. usually [2->3] phones and 5 SIMs

• current phone: #1) ChnM 159 ..
• current phone: Starhub SIM … to receive SMS, but can be stored externally.
• old phone: #2) ChnM 1084.. for GP mobank
• old phone: #3) CMLink .. for gmail
• MLPhone with SIM is needed for IDD calls

Some SIM cards need roaming activation .. MLPhone [email request]; CMLink [self-service]

— If you notice battery declines
Tip: turn off mobile data or turn on airplane mode,,, to preserve battery
Tip: reduce brightness and use dark mode
Tip: Power it off and use your spare phone.