Cellphone to cellphone ports (By this I mean mobile phone numbers) usually take anywhere from 2 hours to 24hours depending on the number of people trying to submit port requests at once.
Because you're trying to port a business landline TO a cellphone line (assuming i'm understanding correctly), these typically take at least 3-5 business days, sometimes longer depending on which carrier you're trying to bring it from, and who you're trying to transfer it to.
Although this is a public mobile forum, any other carrier can offer you wireless services. You could choose get a temporary phone number from the carrier of your choice, and while you're at it, submit your business land line phone number port request. Assuming you're doing this in a retail location, the store agent helping you will be able to submit the required information to initiate a port request, although it does take a while for any business landline phone number to transfer. In the meantime, you can use your business line until it disconnects, but you'll be able to use it with your new carrier once the port is complete. If the port fails or doesn't go through in the expected amount of time, it means there may be a problem with the account # or billing information provided when you were trying to transfer the business landline number.
