hi there. im using an iPhone 4 with firmware 4.3.2. i am in south africa and my phone is jailbroken. i wana update to ios 5 and use the tethered jailbreak until the untethered one becomes available. however i hav been reading about basebands and i do not quite understand. i got my iphone from mtn and it is network unlocked. the baseband is 04.10.01. would it be safe to update to ios 5?