The twists and turns of the US telecoms and media markets get ever more tangled. There has been discussion for several years about whether T-Mobile should merge with Sprint or a cableco – now the firm hints it might do both. Meanwhile, Amazon has long had the potential to move markets in the US, though its venture with satellite firm Globalstar was thwarted by regulatory opposition. Now it may be reviving the fortunes of another satellite player, Dish Network, with rumors that it will be the anchor tenant for a new wholesale network in Dish’s spectrum. Amazon has a king-maker role here, wishing that every Fire based device came bundled with its own connectivity for downloading content. This is something…