cdma vs amps/cdma
is there a big difference in cdma vs amps/cdma especially with verizon, they offer very good phones that do not include amps. And how would the reception be on amps if digital service was not available.
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there really wouldn't be any difference signal strength wise, call clarity is usually, keyword being "usually" about the same...the biggest factor is when in analog you battery strength goes down very very quickly
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In absolutely perfect signal environment, voice quality is a little better in AMPS because there is no A/D, D/A conversion. But once you cross a threshold of about -65 dBm of receive signal strength, the AMPS voice quality trails off signicantly until the call dies. If it were on a chart, voice quality for AMPS would be a steep slope, decreasing to the right as signal strength degrades. Digital would start slightly below AMPs, but be a straight line all the way until it dropped the call somewhere around -110 dBm.
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CDGIII said:
In absolutely perfect signal environment, voice quality is a little better in AMPS because there is no A/D, D/A conversion. But once you cross a threshold of about -65 dBm of receive signal strength, the AMPS voice quality trails off signicantly until the call dies. If it were on a chart, voice quality for AMPS would be a steep slope, decreasing to the right as signal strength degrades. Digital would start slightly below AMPs, but be a straight line all the way until it dropped the call somewhere around -110 dBm.
And the average poster's brain melts and runs out of his/her ears. What he's saying is: You can have an analog call of varying quality, but a digital call will be the same quality regar...
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thank you for the reply, just another question is this why verizon digital is more reliable than t mobil(gsm) since verizon has more towers. Im just toying with the idea of switching with verizon, i have had tmobil for quite some time, with a lot of drop calls. I wonder if their would be a lot of drop calls with verizon. their is nothing more frustrating than a dropped call and having to call back.
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Verizon's coverage if far more than T-Mobile. Just look at the coverage maps for each carrier. T-Mobile is what I like to call an "interstate" carrier! Unless you are near a big city or interstate you probably won't have coverage. Verizon also uses CDMA which does soft handoffs between towers. That will make a big difference in dropped calls.
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AMPS quality is horrible compared to DIGITAL service. AMPS is very staticy, the battery dies much faster, there is no security on your call (people could potentially listen in on your call if they wanted to), etc.
So do you need AMPS? If you have a Trimode phone right now and you've ever had the "A" come up that is the Analog area. If you plan to go there then yes, you will need Analog. -- Posting cities you plan to use the phone in someone from those areas can tell you if its digital or analog.
If you are really worried, get the LG-VX6100 -- trimode w/ camera and speakerphone ... very nice phone and good price.
So do you need AMPS? If you have a Trimode phone right now and you've ever had the "A" come up that is the Analog area. If you plan to go there then yes, you will need Analog. -- Posting cities you plan to use the phone in someone from those areas can tell you if its digital or analog.
If you are really worried, get the LG-VX6100 -- trimode w/ camera and speakerphone ... very nice phone and good price.
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charles910312 said:Put it this way...if you live in an area where AMPS coverage is available or even prevalent...you definitely need an AMPS capable handset. If you live in a big city/metro area and don't travel much...a digital handset won't crimp your style.
is there a big difference in cdma vs amps/cdma especially with verizon, they offer very good phones that do not include amps. And how would the reception be on amps if digital service was not available.
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I actually prefer and looked for an "all-digital" phone when I got my 4500 in April. Had a tri-mode on my last phone, a Samsung A310...would go into analog at the weirdest times and places, like right in the heart of a major metro area! If it did, the signal was terrible, drained the battery in seconds and the voice quality was the worst. So I decided the next time I get a phone it was going to be all digital to avoid the phone going into analog on me. I have not had a coverage issue at all...even going out of the city and freeways.
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Is it not possible to setup a tri-mode phone so that it will not go into analog unless you want it to?
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I think usually it's the other way. You can force it in to analog.. but sometimes I don't think you can force digital only.
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If you travel in the wide open spaces you will still want a Tri-Mode Phone a few more years. It's sure is nice in the back woods of the Upper Michigan Peninsula as well as the deserts of New Mexico. When in the Analog Mode I solve the power problem by just staying "Plugged In". In fact with todays large screens it's not a bad habit, that way your battery is always topped off. 🤣
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That's also a good way to ruin your battery. Charging them when they don't need it has a bad affect. I always tell people to not charge the battery until it is low and they have to. Usually you can get a good 2-4 days out of a battery in digital mode.
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vzwinagent said:
That's also a good way to ruin your battery. Charging them when they don't need it has a bad affect. I always tell people to not charge the battery until it is low and they have to. Usually you can get a good 2-4 days out of a battery in digital mode.
I thought with Lithium Ion batteries you didnt need to have a discharge cycle and that there is no memory effect. Is this not true?
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I think there is less of an affect, but I think it's still an issue. I've seen it with people that abuse their batteries. I always let mine run down to where I know I won't make it through the next day, then charge it. I've never had a bit of trouble.
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There is no memory with these batteries. These bateries are capable of a certain number of charges in their lifetime. Whne you top it off you are not effecting it smemory but rather using one of its charges.
I use backup batteries with a desktop charger and simply exchange them out. When I am away from the office and expect using the phone a lot I take a spare battery with me.
I use backup batteries with a desktop charger and simply exchange them out. When I am away from the office and expect using the phone a lot I take a spare battery with me.
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Well Boys and Girls I disagree, the phone has a charging circuit that cuts off the charging at a predetermined voltage. The battery is charged only when it needs it. Also age is as much a factor as number of charges. My batteries last beyond the life of the phone doing this in a analog environment. However to answer EVERY possible question your hearts could EVER have, ..... go to the Battery University and read Doctor Wizard's 🤣 discussion on Lithium Ion Batteries. Enjoy!
www.batteryuniversity.com/partone-5.htm
www.batteryuniversity.com/partone-5.htm
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Like a Standard Transmition on a car, you should break it in. Meaning, you should charge the battery fully and drain it completely before recharging. And do this 3 times to get the fully potential of the battery.
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Some back story... before my forays into the wireless world with radio shack, I worked for a small company called "Battery Works"... We did everything... re-energizing, rebuilding, manufacturing new packs to customer specifications, test and install of on-sire battery banks and floor scrubbers... Everything from watch batteries to fork-lift batteries, we did it... I know far more about batteries than I ever want to at this point...
Lithium batteries have very little memory effect to them, it's there, but it's not much. Their main problem is the mortality rate...
Manufacturer wants to make 10,000 cells to ship out. they gear up and run 50,000 cells... 25,000 of em are dead off the line, a further 10,000 don't pass QC checks, and 5,...
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Lithium batteries have very little memory effect to them, it's there, but it's not much. Their main problem is the mortality rate...
Manufacturer wants to make 10,000 cells to ship out. they gear up and run 50,000 cells... 25,000 of em are dead off the line, a further 10,000 don't pass QC checks, and 5,...
(continues)
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Yes it is possible to set up your phone this way. I have an Audiovox 9900 and have changed it so that it is digital only. I believe that my old T720 had this option as well but I have tried to block out all memory of this horrible phone.
That being said would not buy a digital only phone because I travel throughout the Northwest and many areas I travel (epically in MT) still only have analog service even over long stretches of Interstate. So when I travel I change it back to a true Tri-mode phone but while at home I leave it on digital only to conserve battery.
That being said would not buy a digital only phone because I travel throughout the Northwest and many areas I travel (epically in MT) still only have analog service even over long stretches of Interstate. So when I travel I change it back to a true Tri-mode phone but while at home I leave it on digital only to conserve battery.
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