Need Advice on which Phone to buy

Hi, I have been an IPhone user for almost 5 years now and I have got comfortable with the device and interface. I am looking to upgrade my I Phone 4S to a higher end phone which will serve my business needs. I mainly use the following applications

• Email (need to review presentations in MS Office and PDF formats)
• Whatsapp
• Skype/Face Time
• Calls
• Camera

While Iphones would be my first choice, I am open to looking at other mobiles. The shortlisted phones are i phone 6, Samsung S6 edge, Note 4 and One Plus one. While my interia from changing from apple is mainly due to comfort level and having a mac and ipads at home. Kindly suggest as i am really confused.

Best 5G Smartphone in India 2021

1. APPLE IPHONE 12 2. ONEPLUS 8 PRO 3. SAMSUNG GALAXY NOTE20 ULTRA 4. XIAOMI MI 10 5. ONEPLUS NORD

Expensive original iPhone Or Cheap Factory Unlocked Original iPhone 5/ 5S Refurbished Phone?

As we all know, the Apple iPhone is rather expensive, and the quality is very good. Now there are some iPhone refurbished phones with the prices much lower than the former. What is your choice?

Original iPhone 5 WCDMA 16GB Refurbished phone, $189.99;
Original iPhone 5S WCDMA 16GB Refurbished phone, $206.99;