Definition of «to upgrade the account»

"To upgrade the account" means to enhance or improve the features, privileges, or level of service associated with an existing account.

Start with a free trial and upgrade your account if you want to have extra credits. (goodsiteslike.com)
You can then upgrade your account by subscribing to any of the monthly plans to access all the features. (datingwebsites101.com)
These features go with upgraded account which costs 29.99 $ per month. (gotocupid.com)
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