You'll be charged a $30 upgrade fee if you purchase a new device at retail price or through the device payment program.
No, you won't be charged the cargo por activación in addition to the upgrade fee.
El cargo por activación es un cargo único facturado al establecer una nueva línea de servicio. The upgrade fee applies when you purchase a new device to replace an old device on an existing line.
If you return the device within 14 days of the date of purchase, the upgrade fee will be refunded.