| Carrier | Unlock Policy | Free Unlock? | Best Paid Option | | :--- | :--- | :--- | :--- | | | Allows unlocking after 60 days of service. Free via their portal. | Yes, if eligible. | Third-party codes ~$8 | | T-Mobile (USA) | Requires 40 days active use. Free via T-Mobile app. | Yes, if eligible. | Third-party ~$10 | | Telstra (Australia) | Requires 24 months on prepaid or account in good standing. | Rare for prepaid. | Unlock service ~$12 | | Rogers (Canada) | Free after 90 days of postpaid service. | Yes (for customers). | Third-party ~$15 | | Claro / Movistar (Latin America) | Often locked permanently without carrier assistance. | No. | Third-party required. |
. You don't need to be a current customer. Simply enter your IMEI (dial to find it) and follow the prompts. Other Carriers: Contact the original service provider directly to request the network unlock code. samsung.com 2. Why "Calculators" Usually Fail Database vs. Algorithm: Most modern ZTE phones (including the zte z222 unlock code calculator 16 digit
If it fails: Do not retry more than 3 times. Some phones have a permanent lock after 5–10 failed attempts. Contact the unlock service. | Carrier | Unlock Policy | Free Unlock