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Seleção de rede, falta de sinal, e configurações de roaming.

This section explains the network settings relevant to using an eSIM while travelling — from the APN configuration some devices need entered manually, to choosing a network mode, through to why a device sometimes shows an unfamiliar network name. What is written here focuses on settings and network behaviour, not the installation or activation steps, which live in other categories.

If the symptom is that data does not work at all despite activation, check the activation category first to confirm every step has genuinely been completed. If activation was done correctly but there is still a problem with speed or a weak signal, the data-speed category answers that more directly.

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What APN settings are and how much they matter

APN stands for Access Point Name — a value that tells the device which channel to use when connecting to the data network. Most devices set this automatically the moment a profile is installed and connects successfully, though some models or situations may require entering it manually.

The correct APN value for your plan, if one is needed, is stated in your order confirmation email. We do not recommend guessing or copying an APN value from a different plan, since each underlying network uses its own value — entering the wrong one can prevent the device from connecting to the network at all.

Most newer devices set APN automatically, with no manual entry needed at all. Try using it normally first, and only check the APN value by hand if a connection genuinely fails to work.

Which network mode to choose

The network mode menu usually offers several choices, such as automatic selection or a fixed network type. Generally it is best set to automatic, or to the broadest option the device supports, letting the device choose whichever network is best in that area itself.

Locking the network mode to a fixed, older-generation type can result in slower connections or no signal at all in areas that generation does not cover. Without a specific reason, there is no need to change it away from the automatic setting it came with.

Why the network name shown is unfamiliar

O que você vêWhat it means
A network name never seen beforeThe profile connected through a local partner network, which is normal behaviour for cross-operator roaming
Letter indicators such as E, 3G, 4G, 5G E beside the signal barsIndicates the network technology currently connected, not a sign of a problem
The network name switching every so oftenThe device is automatically searching for whichever network has the best signal in that area

What commonly appears in the status bar while roaming

An unfamiliar network name does not mean there is a problem — as long as web pages and internet-dependent apps still work normally, the connection is genuinely working.

Turning mobile data on or off while roaming

The device's overall mobile data switch must stay on for the eSIM profile to work at all, separate from that specific profile's own data roaming switch, which is explained in the activation category. If the overall mobile data switch is off, the device will not connect to the internet over any mobile network, regardless of which SIM is involved.

If the device holds both the original main SIM and the eSIM profile at once, check whether the eSIM profile is already set as the primary data route, since if the device is still using the main SIM for data, unintended roaming charges from that main SIM could result.

Before travelling, check that data roaming for your original main SIM is switched off, to avoid unintended additional charges from your original operator.
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Using a VPN alongside an eSIM

Using a VPN while connected through an eSIM works just as it would over any other mobile connection, though a VPN can reduce speed somewhat since data passes through an additional intermediary server, and some countries carry legal restrictions on VPN use, which is something the traveller needs to check for themselves against the destination country's own rules.

Can Wi-Fi Calling or internet-calling apps be used?

Since most travel plans are data-only with no local voice number, making or receiving calls usually relies on internet-calling apps, such as popular messaging apps that support calling, which use the eSIM profile's data normally, as long as an internet connection is present.

The operating system's own Wi-Fi Calling feature is usually tied to your original main SIM, not the newly installed eSIM profile. If you want to use that feature, check with your main SIM's operator whether it supports this and have it switched on before travelling.

  • Let the device set the APN automatically first
  • Set the network mode to automatic unless there is a specific reason not to
  • Confirm the eSIM profile is set as the primary data route
  • Switch off data roaming for the original main SIM before travelling
  • Do not be alarmed if the network name shown is unfamiliar

Selecting a network manually when it is genuinely necessary

The network settings menu usually offers an option to search for and pick a network manually instead of automatic mode, which is not normally needed, since the device already selects the best network in the area on its own. This option is useful only when the device gets stuck on an unusually weak network despite another one being present in the same area.

Selecting manually means opening the list of every network the device has detected, then choosing a different partner network from that list instead. It is worth setting it back to automatic afterwards, since locking onto one network permanently can mean missing a better one after moving to a different area.

Status-bar icons worth recognising

The status bar shows several icons while roaming, some of which may look unfamiliar compared with being at home. The table below explains the general meaning without referring to any one manufacturer's specific icon design, since the exact appearance can differ by operating system and version.

What appearsGeneral meaning
A roaming iconThe device is connecting through a partner network rather than a home operator, which is normal for a travel plan
Letters denoting network type, such as E, 3G, 4G, 5G, beside the signal barsIndicates the technology currently connected, not a sign of trouble
A no-SIM or crossed-out signal iconUsually means data roaming for that profile is not yet on, or the device is still searching for a network

Icons commonly seen while roaming and their general meaning

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Resetting network settings safely

A network settings reset menu exists on most devices, though its exact location and name differ by manufacturer and OS version. This reset can fix an oddly stuck network setting in some cases, without removing an already-installed eSIM profile from the device.

Resetting network settings usually also clears saved Wi-Fi passwords and paired Bluetooth settings, so be ready to re-enter Wi-Fi passwords afterwards, and only use this option once other steps have genuinely failed to fix things.

Why connecting to Wi-Fi can make mobile data look broken

Most devices automatically prefer Wi-Fi over mobile data the moment a Wi-Fi connection succeeds, which can make an eSIM profile look broken when it is really just not being used at that moment because Wi-Fi is available instead.

To test whether the eSIM profile genuinely works, switch Wi-Fi off temporarily and try opening a webpage using only mobile data. If it still loads normally, the profile is genuinely connected and working.

Per-app permission to use mobile data

Some operating system versions carry a separate menu that allows or blocks a specific app from using mobile data at all, apart from the profile's main data-roaming switch. If an app you need still does not work despite the network otherwise connecting normally, this menu is worth checking too.

The location of this menu differs by manufacturer and OS version just like other menus, so searching for terms such as data usage or network access permission within the settings search box is the way to find its real location on your own device.

Most apps are allowed to use mobile data by default already, so checking this menu is only needed when one specific app in particular fails to work.

The network remembers a previous connection

When returning to the same area or country again within a short time, the device often reconnects to the same network it used before more quickly than the first time, since some connection information from before was retained. That said, this behaviour is not guaranteed, especially if the device stayed off for a long while or the profile was deleted and reinstalled.

If a connection is unusually slow despite the same network having been used before, restarting the device or toggling airplane mode remains the most direct fix, since it forces a fresh network search from scratch rather than relying on old information that may no longer match current conditions.

Still cannot get it configured? Contact the team

If adjusting the network mode, checking the APN and resetting network settings still leaves it unable to connect, contact the team via LINE at https://lin.ee/skDPoNx (ID @esimonline) or by email at esimonline.asia@gmail.com, stating the device model, operating system, and everything already tried.

A screenshot of the settings menu currently being attempted also helps a great deal, since the team can see the actual options on your device without having to guess what that menu looks like on the exact model and version you are using.

If a problem only shows up in certain areas of the same country, name the city or district where it happened rather than just the country, since network behaviour can differ from area to area even within one country. Being specific helps the team check and give more targeted advice.

  • Let the device choose networks automatically unless stuck on an unusually weak one
  • Unfamiliar status icons while roaming are usually normal
  • A network settings reset does not remove the eSIM profile, but does clear saved Wi-Fi passwords
  • Switch Wi-Fi off temporarily to test whether mobile data genuinely works
  • Check the per-app data permission menu if one specific app in particular fails to work
  • Contact the team via LINE or email with detail on what has already been tried

Perguntas frequentes

Do I always need to enter the APN manually?+

Mostly not, since newer devices set it automatically the moment a connection succeeds. Only enter it manually if the connection genuinely fails, and use the correct value from your order confirmation email.

Why does restarting the device sometimes bring the network back?+

Restarting makes the device search for and connect to the network fresh from scratch, which often clears a temporary hang caused by switching networks while travelling.

Can a hotspot be used through this network setup?+

Yes, subject to the terms of the plan bought. Detail and how to switch on a hotspot are covered specifically in the hotspot category.

Why does speed differ between areas of the same country?+

Speed depends on the actual network density in that specific area, not a fixed figure set by the plan. This is covered in more depth in the data-speed category.

What should I do if I changed the network mode myself and lost connection?+

Try switching back to the automatic option in the same menu; if it still does not return, try restarting the device once more.

Can offline navigation help save data?+

Yes, many map apps support downloading maps in advance for offline use, which can substantially cut data usage while travelling.

Do I need to switch off Wi-Fi every time for mobile data to work?+

No — the device switches to mobile data automatically once no Wi-Fi is available. Switching Wi-Fi off temporarily is only a way to test it.

After a network settings reset, does the profile need reinstalling?+

No — an already-installed eSIM profile remains intact. The data-roaming switch may simply need turning back on.

Is it a problem if a manually chosen network is never set back to automatic?+

It can mean missing a better-signal network after moving areas. It is worth setting it back to automatic as soon as the reason for choosing manually has passed.

Perguntas comuns nesta seção

Preciso ativar o roaming de dados?+

Sim — mas só para a linha do eSIM. Os planos de viagem funcionam por roaming em redes parceiras. Mantenha o roaming de dados desligado no seu chip de casa para que a sua operadora de casa não possa te cobrar.

Preciso configurar o APN eu mesmo?+

Geralmente não — o perfil configura isso automaticamente. Se você tiver sinal mas não tiver dados, abra as configurações de rede móvel da linha do eSIM e digite o APN mostrado na página do seu pedido. Deixe usuário e senha em branco a menos que seja informado o contrário.

Como seleciono uma rede manualmente?+

Abra as configurações de rede móvel da linha do eSIM, desative a seleção automática, espere a busca, e escolha uma das redes parceiras listadas na página do seu plano. Se não conectar, tente a próxima. Isso ajuda mais onde várias redes se sobrepõem, como aeroportos e áreas de fronteira.

Meu celular se conectou a uma rede mais lenta+

Os celulares se conectam ao sinal mais forte, que nem sempre é a rede mais rápida. Use a seleção manual para tentar outra rede parceira, e verifique se o modo de rede preferido está em 5G/LTE em vez de 3G ou um modo de economia de bateria que limita a velocidade.

Como recebo códigos OTP do meu número de casa no exterior?+

Mantenha a sua linha de casa ativada para receber SMS mas desligue o roaming de dados nela. Receber SMS normalmente é gratuito, enquanto o roaming de dados é a parte cara. Confirme com a sua operadora antes de embarcar que o roaming de voz/SMS está ativado no seu número.

Como evito cobranças de roaming no meu chip de casa?+

Desligue o roaming de dados na linha de casa, defina os dados móveis para a linha do eSIM, e desative "permitir troca de dados celulares" — essa configuração é o que volta silenciosamente para a sua linha de casa quando o sinal do eSIM cai. Reconfira as três depois de pousar.

Como desligo a troca automática de dados?+

No iPhone: Ajustes > Celular > Dados Celulares > desative "Permitir Troca de Dados Celulares". Na maioria dos celulares Android: Configurações > Rede e internet > Chips > escolha o chip de dados e desative a troca automática. Os nomes dos menus variam por fabricante e versão do sistema.

Como devo configurar o chip duplo?+

Mantenha o seu chip de casa para chamadas e SMS, defina o eSIM como a linha de dados, desligue o roaming de dados na linha de casa, ligue-o no eSIM, e desative a troca automática de dados. Nomear as linhas — "Número de casa" e "Dados da viagem" — reduz bastante o risco de erro.

Como eu mudo o APN?+

iPhone: Ajustes > Celular > selecione a linha do eSIM > Rede de Dados Celulares, e preencha o campo APN. Android: Configurações > Rede e internet > Chips > Nomes de Pontos de Acesso, e crie um novo APN com os valores do seu pedido. Reinicie depois.

Posso usar uma VPN com meu eSIM?+

Sim. Uma VPN funciona por cima da conexão e não se importa se ela vem de um eSIM ou de um chip físico. Note que ela adiciona uma pequena sobrecarga e pode reduzir a velocidade. Instale e entre no seu aplicativo de VPN antes de sair.

Existe algo especial sobre o acesso à internet na China continental?+

A China continental restringe o acesso a alguns serviços internacionais. Muitos planos de viagem fazem roaming em redes domésticas chinesas e herdam essas restrições; alguns roteiam o tráfego para fora do país, o que muda o que é acessível. Confira a página do plano antes de comprar, e configure uma alternativa como uma VPN antes de viajar.

Ainda posso receber chamadas no meu número normal?+

Sim, se o seu celular suportar duas linhas ativas e você deixar a linha de origem ligada. Desligue só o roaming de dados dessa linha e defina os dados móveis para o perfil de viagem. Chamadas e SMS ainda chegam, mas o que a sua operadora cobra por recebê-los em roaming é a tarifa dela, então confira com ela antes.

Preciso fazer algo ao cruzar uma fronteira?+

Se o plano cobrir o próximo país, o celular normalmente se reconecta sozinho, o que pode levar alguns minutos. Se ainda não houver dados depois de cerca de dez minutos, ative e desative o modo avião uma vez. Se o plano não cobrir esse país, instale o próximo plano enquanto você ainda tem conexão.

A qual rede vou me conectar?+

Depende dos acordos daquele plano com as operadoras no destino. A página do plano lista as redes compatíveis que podemos confirmar. O seu celular seleciona automaticamente a partir do sinal disponível e pode mudar entre redes compatíveis conforme você viaja. Não garantimos nenhuma específica.

Meu celular fica trocando de rede. Isso é normal?+

É normal quando você está se movendo ou onde várias redes têm sinal parecido: o celular escolhe a melhor naquele momento. Se a troca atrapalhar a sua conexão com frequência, tente selecionar uma rede manualmente onde você está hospedado, depois volte para automático quando seguir viagem.

Posso usar meu eSIM no avião?+

Durante o voo você precisa seguir a companhia aérea e usar o modo avião. Qualquer internet a bordo é o próprio Wi-Fi da companhia, que não usa o seu plano e é cobrado separadamente. O seu plano se torna útil assim que você pousar.

Como e quando eu seleciono uma rede manualmente?+

Faça isso quando o celular não conseguir encontrar uma rede mesmo com as configurações certas: abra a seleção de rede, desative o automático, espere a lista, depois teste as redes uma por uma.

Por que não estou recebendo 5G?+

Isso exige os três ao mesmo tempo: a rede em que você está permitindo 5G para usuários de roaming, cobertura 5G onde você está, e um dispositivo e plano compatíveis.

Leia cada resposta na íntegra