Grammar fix
top up
add credit/money to a phone or card
to add more credit or money to a phone, travel card or pay-as-you-go account
phrasal verbB1core
Hear it in context
Notice where the phrase sounds natural.
- I need to top up my phone before I run out of data.technology
- Can I top up my Oyster card here?technology
Fix the pattern
Pattern: top up + something / top something up
Don't say 'fill up my phone' for credit — it's 'top up'.
Patterntop up + something / top something up