Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to port a mobile number [title] Determine if your number is eligible for porting. [step] Prior switching to a new provider, make sure your current number is eligible for transfer. Check eligibility online with your old provider by entering your phone number and submitting a request.

Ending1: [substeps] If you are switching to at&t, navigate to its " transfer your number to at&t " web page. If you are switching to sprint, navigate to its " wlnp: check eligibility " webpage. Ending2: This ensures that you are entitled to transfer immediately after your request. [substeps] Although you may be eligible for transfer online, it is not mandatory that you call another provider or transfer from your current provider to your new one. Ending3: Do so after contacting your old provider or by visiting the appropriate website. [substeps] To see if your new provider or mobile number is eligible for transfer, visit the body of the program in part 6. Ending4: [substeps] Dial up the number on your " account " and you will be provided a brief date to transfer your united ways phone number to the new provider. Send your request to the new provider you selected to use.

Answer format: ending1/ending2/ending3/ending4