I still have my original smartphone (an indestructible LG P500H) but am currently using a Nexus 4. The N4, however, has been displaying signs of a serious screen issue (touchscreen non-responsive one minute, and super hypersensitive at others) making it nearly unusable. I would like to reactivate the LG but when I attempt to "Change Phones" and "upgrade Phone" online, the SIM card number is apparently invalid (it's Koodo SIM, and was always on Koodo, not stolen, etc.) even though entering the IMEI tells me the phone should be valid. If I take it to a Koodo store can I buy a new SIM card and have it up and running? Or should I be trying to find a new phone on my very limited budget?