I've been able to confirm this behavior on my week-old LG 420g/T-Mob, sending SMS from a PC via
www.txt2day.com--no units deducted if I read the message on the cover display, scrolling with the volume rocker. No units deducted subsequently when re-reading those messages via the menu w/flip open.
HOWEVER, I then did a test sending 3 successive SMS's and DID NOT READ THEM on the cover, just to see what would happen, and how many units would be deducted. On the cover, rather than a single message notification, a folder icon appeared and "3 messages". Pressing the rocker, words to the effect of "Open folder" appeared...but that could not be performed from the closed cover display. I opened the flip, went to the messages menu, Inbox, and saw three new individual messages. I selected the earliest (3rd from the top of the list), which did not open the message, but provided some perfunctory details, and the choices: "Options - Retrieve - Back" which I found odd, since my previously "cover-read" msgs. offered the choices: "Options - Reply - Back" within the menu access (AFTER they had been read on the cover). Not sure what the usual SMS behavior is, but I later discovered that these 3 unread msgs. were being treated as MMS, not SMS...strange. Not one to frivolously burn units, but willing to test, I selected "Retrieve" this one time...it then asked for confirmation (nice feature), and I pressed "Yes". "1.00 Units deducted" WHAT? A WHOLE UNIT?! Then (some details may not be 100% accurate, but close) I had to press something like "Read" and again, "0.50 Units deducted" WHAT? I THOUGHT SMS ONLY COST A THIRD OF A UNIT! Well, having lost almost 5 X the units I had anticipated, I decided to delete the remaining two unread messages. Upon closer examination of the "retrieved" test message, it appeared very different from the "cover read" msgs...they were small white text on dark background, whereas this "open flip retrieved" msg. was a larger black font inside a white box. Details revealed it was MMS. WHAAAAA? Why would either reading the msg. on the cover display, and/or collecting multiple msgs. before reading make any such difference? Of course, sending from a PC via
www.txt2day.com probably has something to do with this, but ALL test msgs. were sent by this method!
My advice is to quickly scroll through each test msg. AS IT COMES IN, rather that to collect and read later. As a rule, I'm not a texter, but if I can read an SMS for free, I'd prefer that to a voice mail.
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