The MNO typical requires that your module be certified on their network. This process will varies with each MNO. Here are a few things that you more than likely will need to do:
o Module Certification
o Device PTCRB & FCC Certification
o Antenna pre-scan
o Certification Meetings and discussion with the MNO
Please start early in the process because this could take several weeks or months to get the entire process done.