PrimaSim

What PrimaSim is

PrimaSim is a prepaid eSIM provider for travelers, operated from Hong Kong and offering data plans to 185 or more destinations worldwide. The service sells eSIMs through an Android or iPhone app and a website, both with real-time usage tracking and support via online chat and WhatsApp. Unlike some competitors, PrimaSim publishes its core pricing as a per-gigabyte rate rather than bundled by destination, though regional and country-specific plans are also available.

Plan structure and pricing

PrimaSim charges by the gigabyte across most of its catalog. The site publishes a headline rate of $3.99 per gigabyte, with regional and country-specific plans priced from that base. Individual country pricing shown includes Indonesia from $5.99, Australia from $4.99, New Zealand from $4.99, United Arab Emirates from $5.99, United States from $4.99, Italy from $3.99, Austria from $3.99, Spain from $4.99, and the United Kingdom from $3.99. Regional bundles are priced higher: Africa from $17.99, Europe from $4.99, Middle East from $10.99, South America from $8.99, and Oceania from $7.99.

The site refers to plans as "travel eSIMs" with "prepaid" and "pay as you go" pricing, though it does not specify whether all plans are prepaid buckets or whether some offer true per-use billing. The site does not publish data allowances per price point, throttle speeds, or fair-use caps. Activation is listed as happening within five minutes of purchase. Payment methods accepted are Visa, Mastercard, Google Pay, and Apple Pay. The site publishes no information on plan validity windows, renewal, or data expiration.

Coverage

PrimaSim's site mentions 180, 185, and 200 destinations across different pages. The device compatibility page lists supported phones and confirms coverage in destinations including the United States, United Kingdom, Spain, Italy, Australia, United Arab Emirates, Germany, France, and others prominent in the navigation. A detailed pricing page shows per-country rates for nearly every African nation (Guinea-Bissau, Guinea, Sierra Leone, Gabon, Liberia, Mayotte, Eritrea, Seychelles, Angola, Equatorial Guinea, Chad, Burkina Faso, Gambia, Burundi, Mali, Democratic Republic of Congo, Madagascar, Cameroon, Republic of Congo, Cape Verde, Sudan, Ethiopia, Malawi, Senegal, Eswatini, Ghana, Rwanda, Zambia, Tanzania, Uganda, Mauritius, Kenya, Namibia, Mozambique, Ivory Coast, Nigeria, Botswana, Zimbabwe, Algeria, Tunisia, Egypt, South Africa, and Morocco) and numerous Asian, European, Middle Eastern, and other destinations.

The site does not name carrier partnerships by country or specify which networks or frequency bands the plans use. It does not state whether plans prioritize any particular carrier in multi-carrier regions or provide 5G coverage where available.

Technical details and features

PrimaSim eSIMs are data-only; voice and SMS are not mentioned on the captured pages. Installation is app-based on both Android and iPhone. The site states plans can be purchased quickly and securely through the app or website and activation happens within five minutes. Users can track data consumption in real time through the PrimaSim app or website.

Device support is broad. The compatibility list includes all major iPhones from iPhone XR forward (iPhone XR, XS, XS Max, 11, 11 Pro, 11 Pro Max, SE 2020, SE 2022, 12, 12 Mini, 12 Pro, 12 Pro Max, 13, 13 Mini, 13 Pro, 13 Pro Max, 14, 14 Plus, 14 Pro, 14 Pro Max, 15, 15 Plus, 15 Pro, 15 Pro Max, 16, 16 Plus, 16 Pro, 16 Pro Max, iPad Pro 2018 and later, iPad Air, iPad, iPad Mini since 2019, Apple Watch Series 3 through 7 and Apple Watch SE). Samsung Galaxy support includes Z Flip and Z Fold series, Galaxy Note 20 Ultra 5G and Note 20, Galaxy S24 series, S23 series, S22 series, S21 series, and S20 series. Google Pixel phones from Pixel 3 through Pixel 8 Pro are supported, along with Huawei P40 series, Motorola Edge and Razr models, and many others including Oppo, Sony, Xiaomi, OnePlus, and additional brands.

The site notes that iPhones 13, 14, 15, and 16 models support two active eSIMs at the same time. Certain iPhones from mainland China and Hong Kong, Macao (excluding iPhone 13 mini, iPhone 12 mini, iPhone SE 2020, and iPhone XS) lack eSIM support. Support is available through online chat and WhatsApp 24/7. The site does not publish support hours in the captured pages.

What is not specified

PrimaSim does not publish throttle speeds, fair-use caps, or what happens when a prepaid bucket runs out. The site does not clarify whether plans can be topped up mid-trip or whether unused data can be carried over or refunded. It does not explain whether the $3.99 per gigabyte rate is fixed across all destinations or if it is only a base used to calculate regional pricing. The site does not detail whether refunds after activation are available and under what conditions. The FAQ mentions that the eSIM can be stored on most phones (up to 5 to 10 profiles depending on the device) but only one eSIM can be active at a time in most cases, though the site does not clarify whether this is a hardware or software limitation.

The site lists no phone number or email address for support, only online chat and WhatsApp. It does not specify which carriers are used in specific countries, so a traveler cannot research coverage or speed reputation before purchase. The site does not publish an SLA or uptime guarantee for its network or service. The site does not explain what happens if a customer's plan fails to activate, how long troubleshooting takes, or what compensation or replacement policies exist.

PrimaSim operates a reseller program for partners, which is mentioned in the navigation but not detailed in the captured pages. The site publishes affiliate program information but no details about commissions, eligibility, or signup process in the captured text. The copyright line reads 2026, and the site notes that it works with "the best and fastest cellular networks worldwide" without naming them or providing verification.

PrimaSim suits travelers who want to understand per-gigabyte costs upfront and use an app for tracking consumption and purchasing plans on the road. It is less suitable for travelers who prefer a single bundled regional plan or who need voice and SMS services. The Hong Kong business address and multi-language support suggest the service targets international travelers; however, the site does not explicitly state a primary market or geographic focus. The emphasis on real-time usage tracking appeals to cost-conscious travelers; the lack of transparent throttle speeds and caps may frustrate those seeking predictability.