No, Most probably, All transaction made on block greater than 480824 is already in Segwit effect.
Give this a read... I think it would apply to most other wallets also
https://blog.trezor.io/prepare-get-ready-segwit-segregated-witness-activation-bitcoin-wallet-950bb2196de9
...After your done reading
and once your wallet has segwit address move your coins to there and you can take advantage of the higher block limits.
You generally don't need to change anything.
Segwit uses a new type of address and all wallets over the coming days-weeks should begin to enable them.
So when you click on receive, it should give you the new segwit address to use. Every wallet has a different schedule when they will enable the function but it will most likely be a seamless transition for most users. You will not be able to send a segwit transaction until you have coins parked in a segwit address, so once you can get a segwit address just move your coins over to it. Then you won't be fighting for space in the blocks with other users sending legacy transactions.