Hopefully the next iPhone supports carrier aggregation.
Me too. That would also allow LTE data while on a phone call, which the current units cannot do.
Hopefully the next iPhone supports carrier aggregation.
Me too. That would also allow LTE data while on a phone call, which the current units cannot do.
AT&T in the NYC metro area fluctuates by me. A month ago I'd be lucky to get 3G speeds on LTE and now it's up to around 10mbps/5mbps which is decent. However, anytime I'm close to large groups of people my iPhone is unusable.
It's getting to the point where I'm not sure AT&T can position itself as a "premium" carrier anymore.
at&t:
10x10 700Mhz band 17 (main band)
5x5 or 10x10 1900Mhz PCS band 2 (deployed in congested areas)
10x10 2100/1700Mhz AWS band 4 (deployed where they do have spectrum licenses)
5x5 850Mhz Cellular band 5 (deployed in areas lacking 700Mhz licenses)
True, PCS spectrum attenuates more easily than 700Mhz spectrum. In urban/suburban markets, at&t towers are spaced with PCS in mind while rural towers are spaced for 850Mhz. PCS LTE should work great in urban/suburban areas when you are outside. Indoors, PCS has less signal propagation and the 700Mhz signal will be stronger. Your phone doesn't really just pick which LTE band is giving a better signal, the carrier files determine what LTE bands your phone is allowed on and which band to prioritize for connection. As network load changes throughout the day, your phone may switch over to PCS LTE if 700Mhz LTE is too saturated even if the signal gain is worse. At night your phone may switch back to 700Mhz LTE for the higher signal gain (less battery usage).
It happens. Sometimes when I'm in Miami Beach and there's a big event going on, LTE barely works at all. I could have five bars and barely be able to load a simple page.
Turn off LTE to hop on HSPA+ and suddenly it works perfectly and fast.
That's the nice thing about having two data networks available. I remember being able to do the same thing when I had an iPhone 4, switching to EDGE when 3G coverage didn't work. Only it was a lot less usable because EDGE is so horrifyingly slow. HSPA+ and LTE are both fast and very usable.
Do you know if there is a site where I can find out what frequencies at&t has deployed? Specifically, I'm looking to find out: location, frequency and whether it's voice or LTE.
I'm not an RF engineer, so the simplest site would be best, but I'll take any info / sites you have
Thanks!
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So the carrier file can dynamically determine which band has the most congestion, and force the phone to switch frequencies?
If so, would you elaborate more on this subject? I always thought the carrier file was just there to "statically" tell the phone what bands were available.
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Why can't the phone automatically switch to 3G when the LTE network become saturated? Is this a limitation of the phone, GSM or something else?
Thanks!
I live in Los Angeles, and I actually get the best speeds in downtown, where I would expect higher congestion. On a good day I can usually get around 12 in each direction on my iPhone 5.
Where I live however, on the outskirts of the county, I'm lucky to get 4 or 5.
- Provider networks are becoming saturated
- Too many people running speed tests
- Tower/Network maintenance
Do you know if there is a site where I can find out what frequencies at&t has deployed? Specifically, I'm looking to find out: location, frequency and whether it's voice or LTE.
I'm not an RF engineer, so the simplest site would be best, but I'll take any info / sites you have
Thanks!
----------
So the carrier file can dynamically determine which band has the most congestion, and force the phone to switch frequencies?
If so, would you elaborate more on this subject? I always thought the carrier file was just there to "statically" tell the phone what bands were available.
----------
Why can't the phone automatically switch to 3G when the LTE network become saturated? Is this a limitation of the phone, GSM or something else?
Thanks!
I've noticed that most people in my area of Los Angeles (Northridge) have better luck with AT&T than Verizon. I always find my phone switching from LTE to either 3G or 1x. In my dorm last semester I could hardly get LTE anywhere especially when I was in my room. I'm thinking about switching to AT&T or either T-Mobile because of this and the cost of service.
I actually live in Chatsworth, and have no problems with AT&T in the entire area. I would definitely recommend it over Verizon purely for signal strength's sake.
For the first question, I would direct you over to check out FCC's website here and click on "browse using a map" and this will allow you to see who is licensed to operate on which frequency in your area. I think this site can be a little confusing, but someone has created a color coded google maps for the same purpose and I think its very easy to see who own what in what areas. On spec maps website, just click on a frequency/band you're interested in and it will light up the US map with color coded sectors that identify what carrier owns that piece of spectrum. This only tells you what spectrum a carrier owns, but it doesn't tell you what they use that spectrum for. But in general at&t uses 700 for LTE, 850 for 2G/3G/4G, 1900 for 3G/4G/LTE
FCC: http://reboot.fcc.gov/reform/systems/spectrum-dashboard
specMap: http://specmap.sequence-omega.net
So yes, the carrier file does tell the phone what bands are available and what band to search for first and this would be the most simplistic carrier file. More advanced files communicate with the cell site and "see" which band is less utilized and actively selects the best band. So during the day you may notice that your phone may become "sticky" with band 2, but as night approaches it becomes "sticky" with band 17 because of its better signal penetration. There's of course more traffic during the day, and your phone tries to pick the band that has less congestion. At night it will switch over to band 17 just because of the less amount of congestion on the site and band 17's superior signal penetration characteristics. After all a phone that has more bars will use less power to communicate with the cell site.
I'm guessing that the carrier file doesn't have instructions for switching to 4G/3G when LTE is over saturated. I think a carrier would like to put such a file on a phone, but at the same time it might end up resulting in high call volumes to customer service/tech support about LTE connectivity issues. Its probably cheaper for them to have you suffer than hire more call center reps. haha
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A thing for everyone here to remember is that the more spectrum a carrier has doesn't necessarily mean they will have faster speeds. A carrier with less spectrum can densify their cell network by having smaller radius cells that serve less people per sector. Having a denser network also has another perk; your phone has to use less power to communicate with the tower you save tremendous amounts of battery.
at&t is currently upgrading their 5x5 band 2 LTE to 10x10. Checked my phone the other day in the test mode and found 10x10 band 2 LTE where it was previously 5x5. At&t hasn't bought any PCS spectrum lately, so they must be refarming their old 2g/3g PCS airwaves to LTE.
Yep. What's funny is she is trying to defend Sprint. That makes me really LOL.
I haven't had a chance to test out Verizon's 20+20mhz AWS (band 4) spectrum here in Seattle, but their 700mhz network is severely overloaded to the point where I can have full bars but nothing data related works.
Once I get a iPhone 6 I'm hoping the AWS network will at least be usable
I'm in Seattle thinking about switching back to AT&T because Verizon has been so unreliable recently. Are you saying the iPhone 6 will support AWS (don't really know what that is though ) and it will be a different ball game?
I'm actually more interested in consistency than speed (assuming speed is reasonable). Really sick of no response from the browser, and of dropouts when working on the bus with wifi hotspot (FYI, I take the 5 bus most days from Greenwood to Harborview downtown!)...
Any advice re AT&T vs Verizon in Seattle welcome!