I was recently given a Samsung SIII (S3) (Mini?) i747m which used to be on telus, it's SUPPOSED to be unlocked.
I stuck my SIM Card in it, and it would not register.
I have done the following.
SIMCARD1 doesnt work (newest)
SIMCARD2 doesnt work, (wife's old one, number still active with time on it)
SIMCARD3 doesnt work, (sisters old one, number still active, time expired)
SIMCARD4 works, wait, no, its not a telus SIM, its PUBLIC MOBILE. It will try to dial but asks for paygo fund topup (This was a freebie I got and used it to test another phone with months ago so the number is active but no time on it currently)
So, right now, with SIMCARD2 in it, after logging into the phone it's leaving me with 'SIM network unlock PIN' which I can press 'unlock' or 'dismiss'
When I press 'dismiss' and get the home screen (sorry Im used to apple ipad) I draw down from the top, and get 2 messages. (unlock does nothing and I don't have a code to plug in)
"Invalid SIM card - Network locked SIM card inserted" (pressing this item does nothing)
"Switch 2G/3G" from one of the network apps I installed. If I press this it brings me to 'Mobile Networks' screen.
Mobile data - checked
Data roaming - unchecked
Access Point Names
Network Mode (LTE/WCDMA/GSM - autoconnect)
If I press 'Acceess Point Names' it gives me a blank screen with a "<= APN +" along the top.
If I press Network Mode it allows me to change between LTE to WCDMA/GSM autoconnect to WCDMA only and GSM only. I've left this as the default as listed above with LTE autoconnect.
If I press Nework Operators, it kicks in and does a search... for what seems forever.
Good, now its stopped searching, and it gives me five options.
The phone is not unlocked, which is why it's asking you for the code. The reason it works with Telus and Koodo is that they are both Telus companies. It's still locked to Telus. You can get an unlock code cheap on eBay if you want to go that route. You will also probably have to manually add the Rogers APN to get data afterwards.