All Samsung Galaxy S9 and Note 8 models now come with free memory cards (up to 256 GB)
The conditions of the deal/s may have changed since the initial publishing of this post.
Samsung is starting the month of July with a brand new deal aimed at customers planning to buy a Galaxy S9 or Galaxy Note 8 in the US. Until July 31 (or while supplies last), all Galaxy S9, Galaxy S9+ and Galaxy Note 8 models sold on Samsung's official website and via the Shop Samsung app come with free microSD cards that double the handsets' internal memory.
The memory cards offered as gifts are Samsung-branded and will match the storage capacity of the Galaxy S9 or Galaxy Note 8 that you're buying: 64 GB, 128 GB, or 256 GB. Both unlocked and carrier versions of Samsung's high-end smartphones are included in this deal, and you can even get the brand new Sunrise Gold S9 and S9+ that Samsung released at the end of June. Your free memory card should be automatically added to your order at checkout, regardless of the payment method that you're choosing.
In case it isn't clear from the lines above, buying a Galaxy S9, S9+, or Note 8 anywhere else than from Samsung's website or the official Shop Samsung apps will not allow you to take advantage of the free memory card deal. More information on this can be found at Samsung via the source link below.
source: Samsung
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Things that are NOT allowed: