iPhone Turn 4G (ATT) off?

socbrian

macrumors regular
Original poster
Mar 25, 2009
139
3
nc
Is there a tweak that lets me turn off the 4G chip? At work, the 4G signal is bad with my building, and wish to just go back to 3G signal. I would like to keep LTE on, because sometimes if I sit near the windows I have LTE. I am unsure if you can do that, but if there is a way to force the phone to 3G that is what I am looking for. Should say this is for an iphone 5s
 

Curun

macrumors 6502
Sep 10, 2013
314
1
Is there a tweak that lets me turn off the 4G chip? At work, the 4G signal is bad with my building, and wish to just go back to 3G signal. I would like to keep LTE on, because sometimes if I sit near the windows I have LTE. I am unsure if you can do that, but if there is a way to force the phone to 3G that is what I am looking for. Should say this is for an iphone 5s
It's not a separate chip, it's all one chip.

3G/4G in ATT terms is the same thing. 4G adds MIMO and higher order modulation to drastically increase speed. (It's like 802.11n wifi... a 20mhz wide single stream 72mbps link vs a 40mhz wide, 3 stream 450mbps link.) For this reason it's hard to discern the difference as the state is very fluid, and processed through the same portion of the transceivers, thus carriers usually just label is all 4G.

There would be no power difference by disabling '4G' and leaving '3G' when the chip is still running the base demodulation circuits for that technology.
 

socbrian

macrumors regular
Original poster
Mar 25, 2009
139
3
nc
It's not a separate chip, it's all one chip.

3G/4G in ATT terms is the same thing. 4G adds MIMO and higher order modulation to drastically increase speed. (It's like 802.11n wifi... a 20mhz wide single stream 72mbps link vs a 40mhz wide, 3 stream 450mbps link.) For this reason it's hard to discern the difference as the state is very fluid, and processed through the same portion of the transceivers, thus carriers usually just label is all 4G.

There would be no power difference by disabling '4G' and leaving '3G' when the chip is still running the base demodulation circuits for that technology.
Ah this is what I was afraid of.. rats, I guess i'll keep yelling at ATT to put a LTE tower closer to work. The closest one only give me 1-2 dots (bars) and 4G is full so my phone likes the 4G better.

Thanks anyway.