Fairly easy - know about the company and research how to answer behavioral questions . Including the problem, task and solution. Have stories about your previous employers on your teams and how you handled difficult situations.

On a Wednesday had a 4 minute screening with a recruiter, was told I would be set up for an in person store interview. On Saturday I received an email that they attempted contact several times and were unable to do so, therefore I was withdrawn from the application process. From Wednesday to Saturday I only had a few calls none of them from a verified number and all screened as scam likely. No voicemail was left, no email or text message. As I go back through the numbers only one is from Verizon and is no longer in service. I emailed the recruiter directly and haven't received a response. 1 phone call is not several attempts and this shows no real effort from the store manager to make contact. You are a cellphone service provider who understands the nature of scam calls and should at minimum leave a voicemail to verify the authenticity of the call.