How to redirect from the n-th number of numbers to a single one?

Question

Telephony

Do you know how to forward from several phone numbers to one?
Minor numbers are considered both in active and offline mode.
Of course, it is better if they are all offline, since this will not require the presence of over many phones.
ps I came to this when I realized that carrying five phones and a tablet is problematic.
Thanks in advance for your reply.

Answer 1

No need to dig into any menu! There are ussd requests. They will accurately and correctly set up redirects)

Answer 2

insert a SIM card by
rummaging through the menu, find the forwarding settings,
drive in the number to which to throw off when unavailable,
repeat the procedure for each unnecessary SIM card, all that
remains is to monitor the balance