Gabrielle Union & Dwyane Wade's Wedding -- No Cameras Or Cell Phones!

Dwyane Wade and Gabrielle Union are warning their wedding guests -- NO CAMERAS, NO PHONES ... which could be a huge problem, since their guests are ADDICTED to social media!

The famous couple has just sent out their wedding invitations (made of wood btw) ... inviting close friends and family members to "Put on your dancing shoes and join us for a THROW DOWN."

It's all set to go down at a mystery location in Miami on August 30th.

Guests have been instructed to meet up at a famous hotel -- where they will be transported to the wedding site.

But the most important part of the invitation is the note which directs the guests to leave their phones and cameras at home "for the comfort of our guests and to protect our privacy."

Translation -- No Twitter. No Instagram. No Facebook ... which could be a huge problem for social media-obsessed guests like LeBron James and Chris Bosh (btw, who's gonna take away Bron's phone?)

One more thing … the no cameras/phones rule will certainly RAISE the price of the exclusive footage shot by the "official" wedding photographer ... if D&G choose to sell to the tabloids.

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