As per Chinese leakster they have got some info of upcoming product launches by Samsung.In a vague tweet mmddj_china suggested that Samsung Galaxy Note 8 is going to launch on Q4 and the upcoming foldable smartphone is launching sooner than expected on Q3 of this year.

                                                                              Tweet from mmddj_china.

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The leakster says he is part of Samsung Galaxy Club and has already leaked many info regarding the S8 which are true.

We have to wait for Q3 2017 for Samsung to officially announce the Galaxy X.

Source