Error shown as per screenshot above.
It can be possible that users may want to store multiple phone numbers of a client, should a client have 2 phones, or store their home phone details as well. However, the app only allows for numerical value, which may not be inclusive to those who have multiple phone numbers.
add n/John p/(hp)98765432 (h)61234567 e/john@gmail.com a/Clementi Ave 2 nt/BFF t/friend
[original: nus-cs2103-AY2324S2/pe-interim#4342] [original labels: severity.Low type.FeatureFlaw]