You can remove the 302 redirect when the original product is available again.
If used correctly, 302 redirects shouldn't hurt your SEO efforts.
With a 302 redirect, the temporary page philippine number list won't be indexed. You won't have to worry about issues related to keyword cannibalization or duplicate content while running an A/B test, for example.
Additionally, with 302s, ranking power doesn't always transfer to the new web page.
In the rare cases where it does pass through (such as when you leave a 302 redirect in place for a long time, say, more than a year), the amount of ranking power passed through would be less than if you had used a 301 redirect.
However, if you leave a 302 redirect up for
too long, Google may start treating it as a 301 redirect. This is even more likely if you link to this "temporary" destination.
Tweet from Google's John Mueller explaining how Google handles 302 redirects
To avoid negative effects on your site, it is good practice to update a 302 redirect to a 301 if you decide you want to make the change permanent.