You can start prepaid no‑contract service with universal SIM kits for activating unlocked GSM-compatible phones or by buying prepaid phones that are sold locked to a carrier. These offerings are prepaid (no long-term contract) and typically include single-line unlimited options at listed monthly prices; a compatible device is required for activation.
The plans reference nationwide 5G or 5G LTE coverage and note 5G Ultrawideband on some offerings. 5G access depends on having a compatible 5G-capable device and being in an area with the appropriate network coverage.
SIM kits are offered for activating unlocked GSM-compatible phones, and most plans require a compatible device for service. Access to 5G or Ultrawideband specifically requires a 5G-capable device and appropriate coverage in your area.
These plans are prepaid and typically sold in service cycles (commonly 30 days) with no long-term contract. Payment is made up front — for example using refill/service cards — and card terms vary: some cards do not expire while others are non-reloadable. Check the specific product listing for exact payment and card details.