Hi,
I have “my Home M Flex” with 50 Mbps 5G/LTE since 2020. Now if I check the available offers on the website it says that I can get Home M with 100 Mbps (always 5G/LTE) for basically the same price:

Would it be possible to do the upgrade without changing SIM? Also, does it mean that there will be 2 additional years of mandatory contract?
Thanks