We don't know if this is a marketing strategy adopted by Sprint to make some publicity before releasing the HTC Evo or is the unfinished battle between carriers.What's for sure is we have another rumor regarding Evo's launch date.

According to Engadget Mobile's sources, there are two possible dates for the HTC Evo's coming: June 6 or June 13, with the 13th being more closed to be accurate. If this is true, we will see in June this "little" device and the new iPhone from Apple, too. Oh, what a challenge!

It has been also reported that 4G will be a $10-20 plan add-on, the price including access to the EVO's 8-device WiFi hotspot capability. For this extra services, it make sense this cost, rather than the standard "Simply Everything"plan, but we don't have to forget Verizon announced free hotspot access on its Palms.

Sprint might have justification for this add-on fee on 4G access, although it seems to be charging only for the 4G hotspot service alone. Hopefully that info is true, otherwise it would be some price pressure on Sprint.

Of course there are no infos about its real pricing, but there is plenty of time until June to find out. Who knows, maybe it will be release earlier; going ahead Apple's new iPhone. Keep you updated anyway.