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Top up an existing eSIM only when the provider confirms that the profile, destination and plan can accept more data. Buy a new eSIM when the current plan is expired, the destination changes, or the provider requires a new activation. The profile remaining on your phone is not proof that either option is available.
Check the current order first
Open the provider account and record the package code, remaining data, expiry, destination and any top-up button or rule. Check whether the plan is fixed-total, daily, or subject to a high-speed allowance. Do not estimate remaining validity from the day the profile was installed.

If the account does not show a top-up option, ask support before paying. A missing button may mean that the plan is not eligible, the top-up window has closed, or the provider uses a new order instead.
When a top-up may fit
A top-up can be convenient when the same profile remains eligible for the same destination and the provider says that the new allowance attaches to that order. Confirm:
- whether the top-up changes the expiry or starts a new validity period;
- whether the destination list stays the same;
- whether the new allowance replaces or adds to unused data; and
- whether a new QR code, installation step or activation event is required.
Keep the confirmation with the order record. Provider rules control the result; a general travel eSIM label does not.
When a new eSIM is safer
Choose a new plan when you are travelling to a different destination, the existing order has expired, the profile is one-time or non-transferable, or the provider cannot confirm a top-up. A new plan also makes it easier to compare the current destination, validity and allowance before purchase.

Do not delete the old profile just to make room. Removal can require a reissue, and a new purchase does not restore a deleted profile. If you no longer need it, follow the provider's removal guidance after checking that no active order depends on it.
Compare the real conditions
Before checkout, compare the package code, supported destination, total or daily data, validity trigger, FUP terms and price currency. Do not compare a top-up amount with a new plan until you know whether the top-up preserves unused data and how its validity is calculated.
The best choice is the one whose conditions are documented for your device and trip. Keep QR codes, activation links, SM-DP+ details, EID, IMEI and ICCID private, and contact support with the order code and device model if the terms are unclear.