Some problems with the HTC Desire include not enough internal memory space, faulty hardware, overheating of the phone and that the phone reboots randomly. Low battery life and the phone not charging properly are some other issues that are often cited.
Though the HTC Desire has 8 gigabytes of internal memory space, only 4 gigabytes are available for the user. Other issues reported, include that the phone's power button often gets stuck inside the body of the phone or is loose. Also, due to its slim body, there is no space for heat to radiate out of the phone, which results in the overheating of the battery or the processor.