Your WhatsApp account is not lost as long as you have the SIM(old/new) using the same mobile number.
If you use a local SIM card while you are traveling, you can still use WhatsApp with your home number. However in this case, if you need to re-verify your account, you won't be able to do this while using the local SIM card.
If you're moving to a different type of phone: You'll keep your account information including your profile photo, about, individual chats, group chats, and settings. Transferring your chat history cross platform is currently available when moving from an iPhone to an Android device or an Android device to an iPhone.
Once WhatsApp is setup on a device, it'll stay there until you uninstall it. Switching SIM cards makes no difference to WhatsApp. It will continue to work normally.
Your phone number follows your SIM card
This means that whatever phone you put your SIM card in will then have your phone number – as long as it's unlocked, of course.
Activating a new SIM card won't impact any data stored on an SD card, but as some phones share the same "tray" for SIM and SD cards, be careful not to remove the SD card when installing or changing the SIM card.
Although I have my phone backed up onto my computer, will I lose all my photos, apps, contacts etc when changing SIM cards? iPhones do not save anything to SIM card. Everything on the phone is saved to internal storage. iPhones do not save anything to SIM card.
Use WhatsApp on Web, Desktop, and other devices by linking them to your phone. You can use up to four linked devices and one phone at a time. Your personal messages, media, and calls are end-to-end encrypted.
Hence, when you switch to a new iOS device and wish to restore the Whatsapp data. You only have to restore the individual Whatsapp chat backup over your iCloud account to your new device. That means all other data over your iPhone remains intact.
If you're moving from an Android phone to an iPhone, you can transfer your account information, profile photo, individual chats, group chats, chat history, media, and settings. You can't transfer your call history or display name.
Remember that if you login to WhatsApp using your phone number on the secondary device, the primary will be logged out of WhatsApp.
All modern-day phones store the text messages in their own memories, and removing or changing sim card wouldn't delete the messages from the phone.
Despite the complicated name, it's basically your phone number. They can also store contact information, telephone numbers, SMS messages, billing information, and data usage. Plus, your SIM will have a personal identification number (PIN) to protect against theft.
You can move your sim and use the phone as you use your phone. But the sim does not contain the data stored on your phone, so none of your contacts, apps, accounts etc., will transfer because you put the sim in. Make sure you backup your current phone. And restore the new phone from the backup from your old phone.
Transferring the sim card from one phone to another has no effect on your apps data or files. If you are letting Documents store your files in iCloud, then they should come back when you log in to iCloud on the new iPhone.
Your iPhone doesn't store contacts on the SIM card. If you want to transfer contacts between iPhone devices, you can use iCloud to back up or transfer content between devices.
When you replace your SIM card in your phone, you lose access to any data on the old card. Photos, apps, and other documents that aren't stored on the SIM are not affected by the card switch.
The SIM card only has the cellular network information. It has no other data or apps. You do not need the old SIM card installed in the new iPhone to transfer data.
SIMs are computer chips that hold information and allow you to connect with your network. This means you can make calls, send SMS messages and connect to mobile internet services like 3G, 4G, and 5G. They're also transferable and you can choose to save messages, contacts, and emails to them.
The SIM card has enough memory to typically store up to 250 contacts, some of your text messages and other information that the carrier who supplied the card can utilize. Photos are not stored on SIM cards, so make sure they are backed up.
In general, the SIM card memory stores all text messages and contacts on an Android phone. However, your SIM card may be damaged or suffer SIM card issues like that phone says no SIM card. Or even, you may mistakenly remove all the data on your SIM card.
SMS messages and contacts
Entries that contain multiple phone numbers and additional phone numbers are usually not stored on the SIM card.
Your pictures are saved to your phone or to your SD card, not to your SIM card.