The on-off merger talks between T-Mobile USA and Sprint are reportedly back on, and sources say a deal could be made by the end of October. As usual, Dish Network is being factored into Wall Street’s speculation about the latest round of telecoms and media consolidation in the US. Last Tuesday, shares in both MNOs leapt on reports by CNBC that their respective parent companies – Deutsche Telekom of Germany and Softbank of Japan – were in “active talks”. And according to analysts at Barclays, that could open the door for satellite TV operator Dish to enter the wireless market in earnest at last. The company, which has acquired substantial spectrum assets, has committed to an NB-IoT roll-out, largely to…