Answer
No, SIM card replacement is described as possible only in the region where it was issued. Therefore, when moving around the country, it is better not to consider the number completely independent of the place where it was issued.
This matters not only for communications but also for banking and everyday services that send codes to the number. Losing a phone or having a SIM card fail can temporarily block access to transactions if a replacement requires a trip to the original region.
In practice, it is advisable to keep backup codes, an alternative login method, and up-to-date operator contact details ready in advance. If the number is linked to banking services, documents, or important accounts, before a long trip it is best to determine where and how it can be replaced if lost, so that you do not lose access.