If you wanted to stay longer in Dubai, the 3 months visa is the most suitable for you. This will give you more time to finish what you need to do in the country and to meet friends and loved ones.
The three months visa is extendable. Every extension is 30 days. You can do a visa extension twice only. After that, you need to go out of the UAE in order to avoid overstay penalties.
Moreover, there is another way to extend your stay. That’s what you called, “Visa Renewal/Change”. You can do visa renewal for another period of 3 months. And no need to go out of Dubai when doing the visa renewal.
The 3-month visa starts from AED 799 per passport. An additional cost will apply for the mandatory travel insurance with Covid19 coverage. Terms and Conditions Apply. The Visa fee is not applicable for High-Risk Nationalities.