I've never mentioned this here, but I've often wondered if someone could make a 4G radio chip dongle that would attach to the charging port and be in the form of an iPhone case. The case could have its own charging port, similar to a Mophie Juice Pack, so you could charge the phone while it was in the case. I don't think there would be a huge market for it, because it would probably cost half of what a new subsidized iPhone would cost, but it might be possible. What do you think? Do you know if the radio chip has to be in direct contact with other parts of the internal hardware in the phone?
I'm sure it's possible, theoretically. Question is whether iOS would allow it... I have a feeling something like that would only work with a paired app (like a custom web browser made by the same company). In other words, you wouldn't be able to configure it as your iPhone's default modem. I guess if you're jailbroken it's more in the realm of possibility... but how many companies are going to market something like that strictly for the jailbreak community?
It still does not actually meet ITU standards for 4G.
Thats not to say that it's a bad product - just pointing out that the mobile companies are using 4G as a marketing tool even if none of them actually fully meet the standards.
No doubt the new services they are selling ARE faster than 3G they just don't fully meet the specifications for 4G yet.
That's not software to convert 3G to 4G in the phone, which is what the OP asked about. MiFi is external hardware that costs $270 without a contract ($99 with a contract) and has a monthly service charge of $50. I don't know about the OP, but there's no way I'd pay for that when I'm already paying for a data plan on my phone.