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Thank you for choosing JETech. Please refer to chart below for the warranty timelines of JETech products, as warranty periods differ according to models.
| Item | Warranty Period (Months) |
| Screen Protectors | 12 or lifetime |
| Cables & Adapters | 12 or lifetime |
| Cases | 12 or lifetime |
| Other Accessories | 12 |
I'm assuming you're looking for a solution manual or "solucionario" for the book "Electronic Communication Systems" by Wayne Tomasi, 4th edition. Here's some information on the topic: I'm assuming you're looking for a solution manual