How to handle multiple phone numbers? one phone per number?

I want to create a phone contact and whatsapp (this is important) for a niche, but i don't have multiple phones (finding a sim card is easy), what are my options? do i have to buy a phone or there are alternativces?

how many sim cards can your current phone support?

One , i have other phone that also have one for my work. No extra phone.

seoargentina said:

I want to create a phone contact and whatsapp (this is important) for a niche, but i don't have multiple phones (finding a sim card is easy), what are my options? do i have to buy a phone or there are alternativces?

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Instead of buying new phone for every number one phone can handle multiple sims or you can use devices that support multiple accounts. simply
yeah another option is using a second phone just for verification then accessing the account through whatsApp web or the desktop app when needed. Just make sure each whatsApp account is tied to a real phone number and follows whatsApp rules otherwise you could lose access to the account. follow rules stay healthy