I'm still on 4.2.2 / MI1. Are there any downsides to updating to 4.3? I'm using my Verizon S4 on Straight Talk via AT&T and connect to HSPA / HSPA + just fine. Does 4.3 make that more difficult to do, is it possible to use the TMobile LTE 2100 MHz AWS band on the Verizon S4 with that update? Lastly I assume rooting and bootstrap are very much available? Thanks.