I can't find all the details but apparently UNE EPM lifted $139m in COP denominated bonds last week, which could partly explain the early redemption of USD bonds. Three tranches, 7-15y with the 7y yielding 5.56%. The early redemption certainly looks a lot better if we view that as a swap with longer maturities and debt in an over time more inflationary currency. Of course, only 50% of this new debt is proportionate to Millicom, so it can only be a partial explanation.
Anyway, Pareto released a sellside report today which was pretty decent. They think Tigo Guatemala by itself is worth $32 per share.
edit: I had some clarification from IR - the COP issue means no change in gross debt and is replacement for earlier local financing, a remainder portion which was in USD. So better currency matching but no relation to the bond redemptions. The other two tranches were "10 and 15 Year variable rate issues with 2.61% spread, implying 5.69% and 6.28% currently".