Guys,
As of June 24th, VIV still had 18m shares to buy back or 1.6% of its capital
VIV did buy back 10/14.5% of the daily volume on from June 20th to June 22ndbut none on June 23rd and June 24th which is surprising
As Henry mentioned, VIV could still be buying despite the quiet period which may have already started (1 month prior to Q2 results on 28/07)