Question about Samsung Galaxy S21

No.
Everything is described at Cashback.

Here again:
Details
Amount CHF 150
Valid from 24.05.2021
Valid until 11.07.2021
Deadline 25.07.2021
Samsung Galaxy S21 Cashback Promotion

If you decide to buy a Galaxy S21 5G, S21+ 5G or S21 Ultra 5G, you can now benefit from 150 CHF cashback. This promotion is valid until 11.7.2021.

The organiser of the Samsung Galaxy S21 5G, Galaxy S21+ 5G, Galaxy S21 Ultra 5G cashback promotion is Samsung Electronics Switzerland GmbH, Giesshübelstrasse 30, 8045 Zurich, Switzerland.

1. as part of the Samsung Galaxy S21 5G, Galaxy S21+ 5G, Galaxy S21 Ultra 5G cashback promotion, participants will receive a cashback of CHF 150 on the purchase of a Samsung Galaxy S21 5G, Galaxy S21+ 5G or Galaxy S21 Ultra 5G.
The promotion period is limited to pre-sales and runs from 24 May to 11 July 2021. The order/purchase date according to the proof of purchase applies. Registrations with a purchase date outside the promotion period will not be considered.
In order to receive the cashback, you must register in due time in the Samsung Members App preinstalled on your smartphone (Samsung account required). We recommend inserting a Swiss SIM card in slot 1 for registration. For a successful verification of the registration, the IMEI number of the device must be provided in addition to the personal contact details, and a receipt/invoice must be uploaded showing the date of purchase, the point of sale/retailer, the device purchased and the purchase price in full and clearly. 4.
Participants must register by 25 July 2021 at the latest. Participants with a Swiss SIM card register via the promotion form in the Samsung Members App under the category "Benefits", participants with a Liechtenstein SIM card at li-galaxypromo.samsung.ch. Later registrations will not be considered. Further information at galaxypromo.samsung.ch.
5. end customers (customers who purchase products for their own use) residing in Switzerland or Liechtenstein are eligible to participate.
After successful registration for the promotion, participants will receive confirmation from Samsung by e-mail. Samsung reserves the right to contact participants by email for clarification in the event of incomplete registrations or registrations that do not comply with these terms and conditions. It is the sole responsibility of participants to ensure that they can be reached for such communication by Samsung.
7. once all the requirements of these terms and conditions have been met, participants will receive an email confirmation and within 8 weeks from that date, the relevant cashback amount will be transferred to their nominated bank/postal account. The cashback is non-transferable and will not be paid out in cash. In the event of a return of the device ([...]"