Stay away from the Blackbery Z10 if you need to use a prepaid SIM or want to use use a local SIM when traveling. The Blackbery OS10 will lock the APN and you wion't have data. Voice and text seem to work okay.
Buy the Z10 if you are on the monthy plan or will not be traveling with the phone or you don't care about data.
If you travel a lot and want to switch SIMs then I would recommend the Samsung or Apple phones
Did you have your Blackberry Z10 unlocked? Even if you did data roaming problem might be hardware related, something like unsupported band frequency or unsupported encryption. Which countlry did you have problem with?
OS 10.1 update is much better about letting you change the APN on SIM's that allow it. IE. Rogers and Telus do not let you change it, but ROAM mobility does. SaskTel SIM also lets you change it when unlocked.
That is correct. Rogers / Bell & Telus do NOT let customers change their APNs as its locked. Carriers in the states do this as well. The smaller carriers do not really care & have it unlocked for customers to change the APN settings.