Just a quick post this month. Recently, thanks to a FOIA request this helpful slide was released. It may influence your choice of provider depending on if and what factors you care about.
Keep in mind, this is by far not the only providers available. If you’re thinking of looking at a new mobile provider, searching for “MVNO” might be of interest for you. It stands for Mobile Virtual Network Operator and includes the providers that most people consider to be “burner phones” such as boost mobile, straight talk, mint, etc. The nice thing about MVNOs is that they tend to be pre-paid plans, so there’s no credit check and all that involved with getting service.
Article talking about the slide deck the above image is from: https://www.vice.com/en/article/m7vqkv/how-fbi-gets-phone-data-att-tmobile-verizon
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