Corebluetooth - Send and receive a large data pack

Question

I am developing an iOS app using only Corebluetooth, in the same application the device can be a Central or a Peripheral. Well, everything works fine, until I try to send a data packet above the limit allowed by the "slave" (peripheral device that commands the limit of data that can traffic to each request of the central).

I possess 3 characteristic:

    CBCharacteristicPropertyNotify
    CBCharacteristicPropertyRead
    CBCharacteristicPropertyWrite

I can send a very large package from the peripheral to the center using the form indicated by Apple in the Btle_transfer app (Cbcharacteristicpropertynotify), however, I need the following methods to send a larger data package than stipulated:

    - (void)writeValue:(NSData *)data forCharacteristic:(CBCharacteristic *)characteristic type:(CBCharacteristicWriteType)type;
    - (void)readValueForCharacteristic:(CBCharacteristic *)characteristic;

When I call these methods with a small byte package, everything happens normally, but when this package increases, it always returns in the delegate responsible for the response of each method, a 628 byte package (smaller than the package that was sent from the other side). If sending over 628 bytes, it is always returned 628 bytes, and it is not possible to deserialize the date on the other side (peripheral or central).

Does anyone know why this happens? I realized that when I send a package of 2000 bytes for example, the delegate responsible for the readValueForCharacteristic is called 4 times, but I cannot mount the package properly. Someone would have an explanation?