I've had similar concerns with prepaid plans, especially when traveling. Some providers let you extend validity based on top-up value, while others have strict deadlines where you risk losing your number if you’re inactive too long. It’s always frustrating when you can't find clear info online and have to rely on fine print or customer service.
In the UAE, I use Du for prepaid services, and checking balance or recharging online is really simple. For topping up, I usually go through
https://paynet.red/uae-mobile-recharge/du because it’s quick and accepts multiple payment options, which is super convenient.