1700 support

**zalym** · 12-21-2010 01:35 PM

Hi,

I am from Canada and I want to use my iPhone in Mobilicity or Wind Mobile, who uses the 1700-2100 band.

If I jailbreak it, will I be able to use my phone on that spectrum? My phone is factory unlocked and activated as well.

Thanks,
Saleem

**n1ckn4m3** · 12-21-2010 03:13 PM

No. The iPhone 4 supports the following frequency bands:

850MHz/1950MHz for US Carriers
900MHz/2100MHz for EU Carriers
800MHz for JP Carriers

Unfortunately, it's missing connectivity over the 1700MHz network that would be required. As there is overlap on the 2100MHz band, it is possible it may work just a little, but it depends on what your carrier is sending over 2100MHz and what they are sending over 1700MHz...

**Olethros** · 12-21-2010 03:36 PM

Originally Posted by n1ckn4m3

Unfortunately, it's missing connectivity over the 1700MHz network that would be required. As there is overlap on the 2100MHz band, it is possible it may work just a little, but it depends on what your carrier is sending over 2100MHz and what they are sending over 1700MHz...

The 1700Mhz is used for uplink - so it simply isn't enough that the 2100Mhz band is supported, the device won't work without two-way communications (down and up)

there's only one smartphone in the world with a chipset that supports all the 3G frequencies, it's made by Nokia and reportedly it's support for all 3G frequencies is it's only selling point (ie it sucks as a smartphone otherwise)

**zalym** · 12-22-2010 01:12 PM

Thanks for the comments. I guess I will have to wait till the iPhone supports all bands.

If I may ask, is this upgradable via firmware or do you need a change in hardware to support a new band? Which chip is used in the iPhone 4? I can scout around in that manufacturer's site.

**Olethros** · 12-22-2010 01:59 PM

Originally Posted by zalym

Thanks for the comments. I guess I will have to wait till the iPhone supports all bands.

If I may ask, is this upgradable via firmware or do you need a change in hardware to support a new band? Which chip is used in the iPhone 4? I can scout around in that manufacturer's site.

It's hardware.. as far as I know.

The chip that determines which frequencies are supported is:
Skyworks SKY77541 Quad-band GSM/GPRS Front End Module

Also, my previous statement about the Nokia phone was slightly incorrect - the N8 doesn't include the 800Mhz band for Japanese carriers that the iPhone 4 has. So neither the Nokia N8 or the iPhone 4 support all 3G bands currently in use worldwide.