Before deleting/ uninstalling a wallet on a device, you must be very sure that you already make wallet backups, not only one but several back ups. It is not enough if you stop there, because you have to test that you can recover your wallet with backups you have. Make sure through testing, your recovery result shows that you succeed to recover a same wallet on your device.
Making physical backups of the seed and recovering your wallet from seed should be done immediately after creation and before funding the wallet with any significant sums. You can either take note of a few bitcoin addresses and then recover your wallet from seed to see if the recovered wallet contains the same addresses. Alternatively, and I think this is better, send a small amount of BTC to one of your addresses, delete your wallet, and recover it from seed. Spend those coins to be absolutely sure that everything is ok.
Yeah, an even easier way, besides writing down the first (or any of the wallet addresses) for reference, is to write down the fingerprint (assuming the wallet you are using shows a fingerprint, which not all wallets do).
A fingerprint is unique to each wallet created and can also be used as a reference to check the steps.
