Yesterday, we posted a data speed comparison, comparing AT&T and Verizon networks. While Verizon seemed to do better than AT&T in every way (in the San Francisco area, at least), it looks like the Verizon iPhone has some shortcomings as well.

Although we missed it, it seems that Apple had posted a comparison chart last week, detailing the differences between the GSM and CDMA versions of the iPhone. This comparison chart solely focuses on how the GSM and CDMA versions of the iPhone handle calls…

The main differences between the two models are, the GSM version of the iPhone supports up to five calls simultaneously for conference calling, whereas the CDMA version of the iPhone only supports up to two calls simultaneously conference calling. Apple also notes that CDMA networks may not be able to add, swap, or merge calls in certain situations, which had already been brought up last week.

Lastly, and for some, one of the most important features in a phone, the CDMA model of the iPhone does not offer the ability to place a call on hold whereas the GSM model does. While these shortcomings in the CDMA iPhone might not bother most people, I can see the inability to add more than 2 calls to a conference call becoming a problem for some; specifically business users.

What do you think?

  • Shrike1978

    To me, this really highlights the reason that GSM is more popular than CDMA worldwide.

  • iKing

    Yeah I’m not makin the verizon switch no time soon.

  • Eduardo

    So basically they just listed the reasons why the CDMA iPhone sucks

    • Kickstar13

      Well, on the other hand, you can actually make a call using Verizon’s iPhone 4. 😛

      • Thomas

        Well I never had a dropped call except with my BlackBerry and I’ve been with AT&T since they were singular.

      • Eduardo

        Dropped calls are one of those things that people just like to repeat over and over, never had an issue with AT&T myself.

      • Pirates Suck

        That entirely depends on where you live. I have had zero problems with AT&T, and I have been with them from way before I got the first gen iPhone. I’m loving my unlimited data and simultaneous voice and data usage. Never had a dropped call, and my data is blazing fast.

        Cellular coverage is an individual basis thing. I make calls just fine with my AT&T iPhone 4 .

      • lol

  • Ernesto Castellanos

    (talking about AT&T and Verizon)
    I just daw the AT&T 4G commercial!..

  • Verizon Guy

    thats cool verizon had that for a few months now

  • MrE

    yeah, I discovered this already when I tried to hide my number the other day

  • dan CDMA suck. No point of creating one for Verizon… damn that suck

  • goofygreek

    wow, that really sucks. i dont really care to much about blocking my number, but having the ability to do it right on the phone is nice, instead of dialing a number each time. but, the fact you cant have more then 2 calls at once, and no hold option, is just total crap in my opinion. i have used conference calling for 5 people plenty of times. plus when you need to dial a number just to enable and disable calling features is stupid.

  • Well thats funny, cuz ive had up to 6 people on a conference call with my Verizon Droid Eris. and ive never had issues with this phone swapping calls, even if it really sucks.

    • Pirates Suck

      Yeah, have you had those same 6 people online during your call with your Eris? EXACTLY.

  • Special Fred

    The reason many long-time AT&T users don’t have problems with dropped calls and such is because the AT&T network prioritizes coverage to corporate accounts and to SIM cards given out before the wireless client base grew too large for the networks to carry. Wireless coverage for the consumer is pretty much a time-share.

  • Greg Tompkins

    I’ve had both AT&T and Verizon phones and now the iPhone on Verizon. For me, the CDMA shortcomings don’t bother me because I find the VZ model consistently works MUCH better. Sure at 3AM then AT&T blows it out of the water but during most of the workday AT&T sucks. I am also finding much better coverage on Verizon than AT&T but I think each individual needs to weigh out his own pros and cons. I think they need to come out with a dual CDMA and GSM phone so you can have one line AT&T and another one Verizon that would be a killer!

  • C

    How the CDMA version (in an Exchange environment) does not have an Invitees or Availability option in the Add Event for Calendar is amazing. Am I the only person that sees this difference?

  • unknown

    I have Verizon’s iPhone and honestly I don’t have any problems. I prefer Verizon not because of the iPhone but because of the coverage and signal. I personally prefer CDMA because of its security, reliability and speed. I do not travel much so I don’t really care if my phone can go overseas or not. For those that do travel obviously a GSM carrier will better suite you. As far as the differences between the two, in my opinion they are slight and arbitrary. I have no reason to hide my number or place multiple call at one time. If I want to make a call while browsing the internet, no problem I have an app for that (no pun intended). There’s no reason to be hating one over the other, I mean seriously they’re inanimate objects! in the end it is all based on personal opinion and each person’s individual need.

  • Greg T

    I got rid of the iPhone altogether. I now think both carriers suck and the tiered data plans are a joke. Now all we need is a Verizon and ATT merger and ma bell will be reconstituted. Next iPhone I’m getting is buy direct from Apple and not going to be activated.

  • zai

    Can a gsm unit I bought overseas be used in the US on CDMA?

  • is LCD screen same tho?