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Does iMessage on iPhone use text messages?

MrXiro

MrXiro

macrumors 68040
Original poster
Nov 2, 2007
3,850
599
Los Angeles
I have an iPad and my buddy has a 3GS. He just updated to ios 5 and I sent him a iMessage to his iPhone. He is worried that it uses his text messages of which he is over his limit of because they come through the normal message app on the iPhone. Does it use up your text messages if you are sending iMessages to an iPhone number?
 
r2shyyou

r2shyyou

macrumors 68000
Oct 3, 2010
1,758
13
Paris, France
MrXiro said:
Cool... I'll let him know.
What about Grey Bubble Texts?
Click to expand...

Grey bubble texts = received texts.

You should see a line above the text or conversation that identifies whether it's part of a "Text Message" conversation or an "iMessage" conversation.
 
xraydoc

xraydoc

Contributor
Oct 9, 2005
10,771
5,227
192.168.1.1
saving107 said:
Blue bubble text = free
Green bubble text = not free
Click to expand...

Just be careful with the definition of "free."

Some people have very limited data plans, and while individual iMessages use very, very little, they do you some (and can get expensive if you're roaming on a foreign network).

Better to say:
Blue bubble = data
Green bubble = SMS
 
G

gentlefury

macrumors 68030
Jul 21, 2011
2,866
23
Los Angeles, CA
xraydoc said:
Just be careful with the definition of "free."

Some people have very limited data plans, and while individual iMessages use very, very little, they do you some (and can get expensive if you're roaming on a foreign network).

Better to say:
Blue bubble = data
Green bubble = SMS
Click to expand...

a typical text message will be less than a byte of data. The lowest end data plan in america right now offers 200MB / Month. So if you only used that for iMessage you could send over 200 million messages. Are you really that concerned?
 
OneMike

OneMike

macrumors 603
Oct 19, 2005
5,814
1,795
Side note, I have text incoming and outgoing text completely blocked on my phone. Have already sent and received hundreds of iMessages. Definitely doesn't use text.
 
xraydoc

xraydoc

Contributor
Oct 9, 2005
10,771
5,227
192.168.1.1
gentlefury said:
a typical text message will be less than a byte of data. The lowest end data plan in america right now offers 200MB / Month. So if you only used that for iMessage you could send over 200 million messages. Are you really that concerned?
Click to expand...

Like I said, the main issue is if you're roaming on a foreign network. Data rates can be massive.

Not everyone lives in America.

----------
steveza said:
Aren't those the incoming messages? Should be free unless you are roaming.
Click to expand...

In the US, the carriers count incoming texts as part of your total.
 
Small White Car

Small White Car

macrumors G4
Aug 29, 2006
10,966
1,463
Washington DC
andylyon said:
Off topic but is that for real? US carriers counting INCOMING texts as part of your allowance? Did not know that - learn something every day!
Click to expand...

Yep.

So, in general, my 200 text plan is really only good for about 100 texts unless the people I write to just never respond.

This is why I hate these people:

Them: I'm at 123 Fake St. Can you meet me here?

Me: Ok, I'll see you in 20 minutes.

Them: k

:mad:
 
9

9822737

Cancelled
Jul 23, 2008
773
15
Wow that sucks. I know where you're coming from I hate one-word replies, and one-letter replies are even worse!
 
steve-p

steve-p

macrumors 68000
Oct 14, 2008
1,740
42
Newbury, UK
gentlefury said:
a typical text message will be less than a byte of data. The lowest end data plan in america right now offers 200MB / Month. So if you only used that for iMessage you could send over 200 million messages. Are you really that concerned?
Click to expand...

Less than a byte? I think not :confused:
 
M

meowr

macrumors newbie
Oct 14, 2011
7
0
gentlefury said:
a typical text message will be less than a byte of data. The lowest end data plan in america right now offers 200MB / Month. So if you only used that for iMessage you could send over 200 million messages. Are you really that concerned?
Click to expand...

Just here to correct your math.
One Byte of data in normal computing terms can only represent one character.

I wish we could actually break down how much data is actually sent/received per iMessage.
1 byte per character in the message
+ packet headers (minimum packet size?)
+ polling the servers to see if the recipient is online
+ delivery receipt confirmation
+ read receipt confirmation if the recipient has it turned on

I just turned off my cellular data, reset the stats, turned on cellular data, and sent 2 small iMessages to my wife. (20-30 characters each)
Usage after the first was 18KB sent, 32 KB received.
After the second it said 42KB sent, 55KB received.

It's not scientific proof, and my iphone might have been doing other data requests.
But it seems to use a LOT more data than we would think.
 
E

EJ257

macrumors newbie
Oct 17, 2011
17
0
meowr said:
Just here to correct your math.
One Byte of data in normal computing terms can only represent one character.

I wish we could actually break down how much data is actually sent/received per iMessage.
1 byte per character in the message
+ packet headers (minimum packet size?)
+ polling the servers to see if the recipient is online
+ delivery receipt confirmation
+ read receipt confirmation if the recipient has it turned on

I just turned off my cellular data, reset the stats, turned on cellular data, and sent 2 small iMessages to my wife. (20-30 characters each)
Usage after the first was 18KB sent, 32 KB received.
After the second it said 42KB sent, 55KB received.

It's not scientific proof, and my iphone might have been doing other data requests.
But it seems to use a LOT more data than we would think.
Click to expand...

That seems a bit high, 20-30 char = 20-30 bytes. If you were in weak signal area or on a congested tower it could be retransmissions. It's going out over the air, not everything is guaranteed to get through the first time.
 
S

sclawis300

macrumors 65816
Apr 22, 2010
1,472
196
xraydoc said:
In the US, the carriers count incoming texts as part of your total.
Click to expand...


I think he is saying, if it shows up as blue on your end when you send, and you get a grey response, that is incoming message of the same type, therefore it is free.
 
Mliii

Mliii

macrumors 65816
Jan 28, 2006
1,126
5
Southern California
I am not exactly sure what this means in terms of how much "plan data" iMessage uses, but I tried this experiment:

I turned on Airplane Mode and then separately turned on WiFI and selected my local network.
Then I went to text someone I know who has IOS 5 loaded on their iPhone.
Initially, you get a message that says, "You Must Disable Airplane Mode To Send Or Receive Messages".
Ignore that message and just hit CANCEL.
Send an iMessage.
(Blue Bubble)
The message goes through as an iMessage. Replies come through as well.
WHAT IF- you don't have a data plan at all? Will this still work? If you are on WIFI, are you using any "plan data"?
 
T

takeshi74

macrumors 601
Feb 9, 2011
4,974
68
gentlefury said:
a typical text message will be less than a byte of data.
Click to expand...
That's impossible. A single text character is one byte. Verify your sources, as always.

gentlefury said:
a typical text message will be less than a byte of data. The lowest end data plan in america right now offers 200MB / Month. So if you only used that for iMessage you could send over 200 million messages. Are you really that concerned?
Click to expand...
Incorrect assumptions aside, everyone's usage is different. For some it does matter whether it matters to you or not. There's also a bit of overhead with these messages and media attachments obviously use up more data.
 
D

dffdce

macrumors member
Jun 30, 2010
59
0
meowr said:
Does that include the delivery notification?
Click to expand...
Yes that does include delivery notification.
meowr said:
And can you find out how often the iDevice polls the Apple servers to see if the recipient is online? and how much data that is?
Click to expand...
I would like to investigate this some more when I get a little time. I did notice a very brief spinning wheel when I selected his email address the first time. I suspect there was some online/offline - sms/iMesage decisions happening then. I didn't have the packet sniffer running at that time though.
meowr said:
Or how much data to receive an iMessage, for that matter....
Click to expand...
Looks like 745 bytes received and 185 bytes sent.
 
T

Thomaswde

macrumors newbie
Oct 21, 2012
1
0
Stating that one character = one byte makes zero programming sense. Bytes are binary like "0011010101101" and it is a binary sequence that make a single character. So a character could be a number of different amounts of bytes depending on how many numbers the sequence requires to make that character. Not to mention all the other data required to send it from device to server to device. So for a iMessage to require a couple KBs is not unthinkable.
 
S

soundman245

macrumors newbie
Nov 5, 2012
1
0
Guys. Look it up. A byte is 8 bits. A single ASCII character is also represented by 8 bits. One byte is one character. Two or more bytes comprise a "word" of 16 bits or 32, 64 etc.
 
B

buddybd

macrumors 6502
Jul 28, 2011
359
0
Its official...people will argue about anything here in MR.

Unless you go abnormally crazy, you won't even get close to 10MB in iMessages (excluding pictures) so ya it's practically free. I cancelled my text plan entirely just because of iMessage and the popularity of iDevices.
 
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