As explained above, most carriers use different frequencies and band plans for their LTE networks so they will not work without software lock on the device in these networks. First of all, this phone does not have a 3.5 mm headphone jack, which means you either need to use Bluetooth headphones or bring the supplied headphone adapter with you wherever you go. I am surprised by a TMO SIM card in it, and in the TMO network you should be able to call the World Cup (123 I think) card number and never had anyone tried the visual answering machine on installing a marked phone. It would also be a good idea to unlock the phone before leaving your current airline because of the incentive to help you through the process. The LG V30 gives a better sound experience than any other competitor thanks to the integrated premium audio components. This allows the smartphone to provide high quality high-quality headphones with power when traveling. The Substitution Program may not be combined with other Samsung, Carrier, or Reseller campaigns, rebates, or promotions, unless expressly provided in the terms and conditions of these offers. Phone Password Unlock Code here. If the device is locked, you must obtain the correct unlock code. How Much To Unlock Iphone 5s Telus. If you receive the code elsewhere, specify which mobile network your device is connected to. You need to talk to your service provider to understand the terms of the contract and the mobile device unlock policy. I have to get a phone that I careful about (Samsung - too many complaints about the screen - and the fourth phone that I bought two years ago was an S5 and it broken screen so no phones took two years). As I explained as part of my answer to the above questions about locked and unlocked phones, CDMA devices do not have the same flexibility in the form of device portability as GSM phones.