For Donated By / Donate To, both registered phone numbers use the
same 4-digit PIN and the same wallet balance.
Example: if ₹50 is added, both can use that same ₹50 balance.
How it works:
Self: one phone number uses the wallet.
Donated By: receiver phone + donor phone are stored in
the same account row.
Donate To: donor phone + receiver phone are stored in
the same account row.
For Donated By / Donate To, both phone numbers use the
same PIN and same wallet balance.