New answers tagged cell-phone-carriers
Using any phone, start your messages with "*0#" then you are going to get your delivery confirmation.
The flowchart on unlocking an iPhone (no matter what model or what carrier) is here. If you're having problems with Customer Support with a specific carrier. List the exact words you used to request the unlock and consider getting them to explain exactly what the issue is. Hold their feet politely to the fire if they are not supporting you as a customer. ...
This looks like a "Flash SMS" or "class 0 message", supposedly only available to be sent by your carrier, but available to others via Apps (Apple App Store, Google Play Store) and in some carriers, by prefixing your message with *go. There are more technical details on this answer at Stack Overflow, specially in this linked article: As per the SMS ...
Just a heads-up: I unlocked my iPhone 4 (using AT&T's unlocking service) but found that it does not function with the Vodaphone simcard I bought in Greece. I hear that there are two kinds of unlocking, one for domestic service and one for international (GSM) service.
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