Yes, Vodafone can demand old devices back if they were provided to the customer as part of a lease or rental agreement, or if the customer is upgrading to a new device and the old device is still under contract. In these cases, Vodafone has the right to request the return of the old device in order to fulfill the terms of the agreement. It's important for customers to carefully review their contracts and understand the terms and conditions regarding device returns. **

It is generally more effective to make polite requests rather than demanding something. Begging can come across as desperate and may not be well-received, while demanding can be seen as aggressive and off-putting. By politely asking for what you need or want, you are more likely to get a positive response and maintain good relationships with others. **

There are a variety of tech gadgets you can wish for Christmas, depending on your interests and needs. Some popular options include smartphones, tablets, smartwatches, wireless headphones, gaming consoles, and smart home devices like smart speakers or security cameras. Consider what would enhance your daily life or hobbies, and make a wish list based on that. **

Yes, one can demand something if they feel it is necessary or important. However, it is important to consider the context and manner in which the demand is made. It is always best to communicate one's needs and expectations respectfully and clearly to increase the likelihood of a positive outcome. **

Klarna's demand can be seen as justified due to the increasing popularity of their buy now, pay later service among consumers. The convenience and flexibility it offers to shoppers, along with the potential for increased sales for merchants, supports the demand for their services. Additionally, Klarna's innovative approach to online shopping and payment solutions has helped them stand out in the market, further justifying their demand. **

Yes, mathematicians are in demand in various industries such as technology, finance, and data science. Their expertise in problem-solving, critical thinking, and analytical skills are highly valued by employers. With the increasing reliance on data-driven decision-making, mathematicians play a crucial role in developing algorithms, models, and solutions to complex problems. As a result, there is a growing demand for mathematicians in the job market. **

ProSieben demands high-quality content that appeals to a broad audience, including popular TV shows, movies, and original programming. They also require innovative and engaging advertising solutions to reach their viewers effectively. Additionally, ProSieben seeks to continuously adapt and evolve their offerings to stay competitive in the ever-changing media landscape. **

Vodafone's demand refers to the level of desire and need for their telecommunications services and products. This includes mobile phone plans, internet services, and other communication solutions. Vodafone's demand is influenced by factors such as consumer preferences, technological advancements, and competitive pricing. The company seeks to understand and respond to this demand in order to attract and retain customers in the highly competitive telecommunications industry. **