Google has confirmed it is testing a 5GB storage limit for some new Gmail accounts , with users able to unlock the standard 15GB by adding a phone number. Android Authority reports: While the company didn't mention which regions are impacted, user reports from yesterday were mostly from African countries. That said, if Google's tests prove successful, this could possibly become the norm for new sign-ups in more regions. The company could be testing ways to discourage users from creating multiple Gmail accounts to access free cloud storage. However, if you already have a Gmail account with 15GB free storage, it shouldn't be impacted by this change. The language on Google's support page mentions "up to 15GB of storage." However, it's a recent change.…