Ios downgrade message is gone.

Reasons for SMS disappearing automatically: 1. Send it like a voice, it only shows for a few minutes, and it cannot be saved; 2. System version BUG problem; 3. The system does not refresh or respond. Maybe iCloud has a delay.

The recovery operation is:

First, back up the data with iCloud.

1. Click the "Settings" function on the phone, and then click "iCloud" in the "Settings" interface.

2. Click the "Backup" function in iCloud to enter the "Backup" interface. Open the "iCloud Cloud Backup" function, and then click "Backup Now".

3. After the backup is completed, in the storage space of iCloud, click "Manage Storage Space" to view the backup situation.

Second, iCloud resumes backup.

1. Click Settings-General on your phone.

2. In the General interface, click Restore-Erase All Contents and Settings.

3. Restart your phone, enter "Applications and Data", click "Backup and Recovery from iCloud Cloud", log in to your iCloud account, and select the backup file.

IPhone has an email program that supports HTML, allowing users to embed files in emails, including photos, PDF, Word, Excel and? PowerPoint attachment, which can also be viewed on the mobile phone; In addition, Apple's MobileMe platform provides an email push function, which simulates the popular BlackBerry email program and reminds users to receive new emails and make annual subscriptions.

The firmware of the first version of iPhone works by opening IMAP on the Microsoft Exchange server. Does Apple also allow Microsoft ActiveSync? (Until July, 20 10) Support the firmware of iPhone2.0 released by the platform (including email push). IPhone will synchronize the settings of email account with Apple's email application, Microsoft Outlook and Microsoft Entourage, or it can be set manually locally. If set correctly, e-mail programs can access multiple IMAP or POP3 accounts.